I think the life expectancy of the 2012 is basically Catalina, I doubt it will get any new macOS updates. If it were me I’d either replace the battery or wait. I am also still using my 2012 Retina MacBook Pro, use it primarily with design, CAD, Architecture rendering (revit with boot camp or parallels), and I am starting to look the 16” looks like it might be worth it when it drops. I had the battery replaced a while back, luckily (for me) when the supply was short and ended up being replaced for free.so.. I still have my MacBook Pro 2012 retina.
the battery needs to be replaced. It’s swollen lol
Is it worth it to upgrade or replace battery? I use it for work and graphic designing. Thank you.