Gideataff wrote:
Thank you, I guess a 2015 model is considered obsolete now
If that Mac is still doing the job that you need it to do, you could keep using it whether it is "obsolete" or not.
That machine has a very nice 27" 5K Retina screen, has user-upgradable RAM, can accept lots of RAM, and has connectivity that is still pretty decent (other than the absence of any modern form of Thunderbolt).
Since this is an Intel-based Mac, there is – or was – the option to go to the "Dark Side".
Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support
(Some sites suggest that you can no longer purchase Windows 10 per se, but that you can download Windows 10 from the Microsoft site, and then activate it with a purchased Windows 11 key.)
If you upgrade, you might know of some friend, relative, or charity who would appreciate the machine - even given its age and limitations. As long as you're up-front about things – and prepare the Mac properly for a new home.
What to do before you sell, give away, trade in, or recycle your Mac - Apple Support