Ubuntu 20.04 LTS was released in 2020-April (thus 20.04) with 5 years of standard support life; that was extended until 29 May 2025 by Canonical, which is this month!
Why not plan and perform your release-upgrade NOW ! as even Ubuntu 22.04 LTS is still supported 30 May 2025 on this site; where your existing [20.04] system isn’t!
If you change the default python3 version; there are effects on a desktop system, so have you considered those effects?
Support here ends for 20.04 on 29 May 2025 don’t forget.
- Welcome To Support And Help
- Ubuntu Fridge | Extended Security Maintenance for Ubuntu 20.04 (Focal Fossa) begins May 29, 2025
Canonical will continue support for 20.04 LTS via ESM, but this site’s Support and Help isn’t Canonical support, but Ubuntu community support don’t forget.