Analysis: keep the Arch Linux base
Split out of https://invent.kde.org/kde-linux/kde-linux/-/issues/424
## Pros
- Status quo; no additional work required to make it happen
- Minimally-patched packages minimize work required to undo patches we don't benefit from
- Arch Wiki fully applies to the base distro, providing great documentation for how to build or change basically anything we want
- Build and debug files included in packages; no need to manually add them later
- Rolling release model means great support for cutting-edge hardware, and dependencies are always new enough for git master KDE software or anything else
## Cons
- "Latest is not always greatest"; UX breakage from upstream that passes through Arch requires us to do all the QA
- Packaging instability: https://invent.kde.org/kde-linux/kde-linux-packages/-/issues/9
- With no stable releases, any package combination we freeze on may need patching by us
- Many packages that we want [are only in AUR](https://invent.kde.org/kde-linux/kde-linux/-/issues?sort=created_date&state=opened&label_name%5B%5D=Needs%20packaging&first_page_size=100), which is dangerous and has flaky infrastructure
- Doesn't package a version of ffmpeg without patent-encumbered codecs; this is a DIY affair or else you have to use gstreamer
- No package changelogs we can parse and send along to the user in Discover
Feel free to discuss in the comments, and suggest more pros or cons.
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