What to do with a macbookpro 11,2? (2015)

i have a MBpro 11,2 (2014) with 16gb ram, i7 2.5 GHz and 512 GB storage.

It still has lots of life inside and still running fast. It was stopped at the OS Big Sur ( i thought someday Apple would give an update but never happened) . i don't want to discard it as electronic junk .

Which version of OS should I update it into using OCLP ? I want to keeping up with the speed. Does Sonoma enough for my laptop?