"Long-Term Support" doesn’t mean what you think – Adventures in Linux and KDE

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Nate

FOSS culture, Switching to Linux

May 23, 2026

5 Minutes

My last post about good beginner-friendly KDE-focused operating systems sparked some discussions about the concept of "Long-Term Support" (LTS) releases.

But what does this term mean? It’s a bit generic-sounding, making it easy to interpret as meaning almost anything. So let’s go to the source: how the term is defined by the operating systems using it! Here are the non-commercial ones:

Debian Stable says:

Security updates are provided by Debian security team for three years. This generally means that each stable release is supported for its whole life plus an extra year (or so) after a new version of stable is released. In addition, further security support is provided by the LTS and LTS/Extended projects.

Ubuntu says:

LTS stands for long-term support — which means five years of free security and maintenance updates

Kubuntu says:

The latest Long Term Support (LTS) version of the Kubuntu operating system for desktop PCs and laptops, Kubuntu 26.04 [is] supported with security and maintenance updates, until April 2029.

(I didn’t include openSUSE Leap because its marketing material doesn’t use this term, though what it offers is fairly similar in practice)

So these operating systems are fairly consistent about what "Long-Term Support" means to them:

Each discrete OS release will continue receiving updates for a certain number of years.

Those updates will include fixes for security issues.

Those updates may include whatever "maintenance" means; Ubuntu & Kubuntu promise this, Debian doesn’t say.

Those updates will not include any new features, UI improvements, or other non-bug-fix releases from the software’s developers. That is to say, each piece of software is effectively locked to a specific version for the life of the release.

That’s it! So let’s look at what’s NOT promised:

Lack of bugs

Lack of crashes

Fixes for non-security issues

Personal support for issues you encounter

Support for newer hardware devices (Ubuntu offers "hardware enablement" kernels for desktop installs by default, but they come with no stated guarantees and don’t cover the parts of hardware support that go beyond the kernel)

That doesn’t mean an LTS release of Debian, Ubuntu, or Kubuntu will be devoid of these things. It just means they aren’t promised. Probably you’ll get a lot of them anyway, but there’s no guarantee.

I think this is where some of the persistent confusion around the LTS topic comes from.

LTS releases are fairly stable and reliable as long as you use the most popular software from their included software repositories. So in the circumstances when this stops being the case, I think sometimes people can feel betrayed. They think, "I thought this was supposed to be stable! Why didn’t anyone fix this bug yet? Where’s my long-term support?"

But Debian, Ubuntu, and Kubuntu never promised any level of stability, reliability, or absence of bugs. They promised that the version-locked software in their repos would receive security fixes for a certain number of years. Ubuntu and Kubuntu also offered a certain amount of non-guaranteed best-effort hardware compatibility improvements and non-security bug fixes.

That’s it!

So it’s important to understand what you’re actually getting with an LTS-style OS. And maybe it’s not for you. There are plenty of other options for people with different desires:

I want newer software

If you’re a software developer or a technology enthusiast, you may want to get software on or closer to its developers’ release schedules. This will give you a stream of new features, UI improvements, and fixes for bugs. In this case, the better option is a rapidly-updating OS like Arch Linux, openSUSE Tumbleweed, Fedora KDE, or one of their children.

The trade-off here is that you may have to live with some things that are currently working getting broken after updating. In other words, the bugs are unstable, unlike in an LTS OS where the bugs are stable.

I personally fall into this group, which is why I use a rapidly-updating OS and not an LTS OS.

I want fewer bugs

I think a lot of people choose an LTS OS to experience fewer bugs, but this is generally not a strength of the LTS product. When an LTS OS freezes on a specific set of software, all the bugs in those versions of the software are frozen, too. Unless the LTS OS provider fixes any of those bugs themselves or backports fixes for them, users will be exposed to them for the lifetime of the release.

With a rapidly-updating OS, when software developers fix bugs in their software, you’ll get those bug-fixes quickly. As long as the software itself is becoming less buggy over time, a rapidly-updating OS shipping software close to its developers’ release schedules will likewise become less buggy over time.

It’s not all puppies and rainbows, though. A fast pace of change means...