I doubt debian is what you want if you want to stay up to date. It’s newish now, but won’t get updates for another 2 years.

I’ve never run into issues updating to all short term Ubuntu releases between LTS versions when I used Ubuntu. Though I’ve now switched to Debian as I don’t care about latest updates and some snaps consistently gave me issues.

Maybe Fedora is what you would prefer though?

KDE is available on any distro. Just need to install it if it’s not the default desktop.

This looks to be a fork of organic maps? What is the difference? Or advantages?