11
Ok, new question, Updates!
(lemmy.ca)
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Yes, you can upgrade in-place. If I recall correctly, you just have to change the release channel from LTS to non-LTS in the Sources app, then trigger an update (I don't quite remember how to do)
No, as I said above. But it's always a good idea to have backups if you ever need to wipe and re-install.
Hard to be 100% sure without knowing which apps and how they were installed, but most likely yes as their dependencies might no longer be available on Plucky.
Refer to my first answer