Compile the entire thing from source, manually install it in /opt, manually satisfy all its dependencies and create necessary simlinks and PATH variables.

And no.

1. Pain, torture, and screaming as your system slowly burns.
2. No, definitely not.

Dust0741 my apologies. As others rightly pointed out I didn’t answer appropriately and deleted the postt… You won’t be able to get the latest kde on Debian. You could look at Sid or Testing but I don’t know if they ship that. I dont use Sid or Testing so I couldn’t help you if they do.

Maybe try getting it running in a container. Just shutdown your current display manager and then create a Fedora container with everything passed though. Theoretically it should work but I’ve never tried. There might be a permissions issue.

You might be able to run the latest KDE or gnome in a distrobox podman or docker container:

https://github.com/89luca89/distrobox/blob/main/docs/posts/run_latest_gnome_kde_on_distrobox.md

Hey dust, I have been using linux for about 24 years ago and I’m gonna explain it to you straight here.

debian is rock solid. It’s great for servers. It’s also great for laptops: That is laptops where you don’t really care about having anything bleeding edge. I need tmux, a few compilers, vim, and a browser. Debian!

I’ve got a kid and get at best 45 minutes per week to code on side projects. My system can never be broken. I use Debian on my Linux laptop and my droplet server. No surprises.

But if you want to occasionally get a brand new desktop environment hot off the presses, Debian‘s gonna work against you. I think Ubuntu mint is great.

Good luck