I use KDE neon user edition, which is basically the latest Ubuntu LTS base + rolling release KDE packages on top. That way I get a rock solid LTS core with the added benefit of always getting the freshest KDE Plasma updates, which is definitively my favourite DE.

Details about my installation: It has proven to be quite resilient. The installation's life started as Kubuntu 18.04 in late 2018, then upgraded to 20.04, then, using some nifty tricks from a Gist I found, I migrated my Kubuntu install to KDE neon a couple of years ago, which I then eventually upgraded to the 22.04 rebase when that came out. I've had a package conflict here and there and the occasional issue due to this migration path, but always been able to rectify it fairly easily. The installation has also survived a full system upgrade, first migrating from HDD to SDD for the system disk, and during 'rona, a full upgrade of motherboard, processor and RAM, all with no issues. Just booted without any complaints. That was nearly never the case when I was a Windows user, if I changed anything, it would throw a hissy fit. Needless to say, I'm happy with the status quo :)