I use Plasma 5 since that’s what Debian provides.
If I discover a bug, does it make any sense to report it since development has shifted to Plasma 6?
If the answer if yes, then do we expect fixes to be released in Plasma 5 or 6 or both?
the 5.27 desktop is still supported as an official product, so yes.
if you can find a bug in that, it’s worth reporting.
as for the other kde apps, i’m not so sure… tried to file a bug on kate version 5 and they just wanted me to try a latter version.
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No, they won’t get any attention; in fact we’ll probably close them as “RESOLVED UNMAINTAINED” and ask you to upgrade. If you’re lucky, the bug reports will be marked as a duplicate of something fixed years ago. 
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so is this response inaccurate?
Blockquote
Thank you for the bug report!
However Plasma 6.1.5 is no longer eligible for support or maintenance from KDE; supported versions are 5.27. (LTS), and 6.2 (non-LTS) or newer. Please upgrade to a supported version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one.
emphasis added.
From a policy perspective, it’s accurate: our policy is to support (for certain definitions of the word) a Plasma LTS release until the next one comes out.
From a de facto perspective, we don’t support it, because doing so would require maintaining parallel Qt5-based build environments and using 2 year-old software, and no KDE developers I’m aware of have any interest in this. In fact, interest in supporting older Plasma LTS versions is slim even when they share a Qt major version.
Personally I consider the Plasma LTS product to be a lie and a broken promise, and I’ve proposed that we cancel it in the future; see Plasma Sprint 2025 in Graz (#15) · Issues · Plasma / Plasma Meetings · GitLab.
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