Yeah good ones allegedly last 200 years if stored correctly. Cheap ones are 5-10. 20 can be expected for quality CDs stored correctly.
But no matter the claimed quality, it’s a gamble. Our local library had a lot of 10-20 year old CDs that had developed microbubbles.
5 years is low range for CDs, but common enough that you should be taking backups for anything you keep longer.
Apologies if you already know this, but just making sure: A language server is first installed independently from its emacs/vim/etc integration.
You have lsp-mode set up. Did you install python-lsp-server and just need a guide to point lsp-mode at it?