- Install anyway
- daily drive
- do a SeedVault backup on a USB stick
then optionally, after a short while if you are convinced
- buy a 2nd hand Pixel 8 (cheapest with longest support) or whatever match your preferences, maybe by then even a Motorola with official support
- bring your SeedVault backup back to the new device including, contacts, apps and data
No matter what you do you will be "left behind" but at least you have time to learn something useful in the meantime then reassess.