Mac Studio vs 2013 Mac Pro

Performance benchmarks: https://browser.geekbench.com/mac-benchmarks

https://browser.geekbench.com/macs/mac-studio-apple-m1-ultra

https://browser.geekbench.com/macs/mac-pro-late-2013-intel-xeon-e5-1680-v2-3-0-ghz-8-cores

Mac Studio M1 performance is substantially faster than the Mac Pro 2013; roughly three or four times faster.

New I/O and new storage is massively faster, too.

Less power and less heat, too.

internal memory and storage cannot be upgraded.

I’d stay with at least 64 GB of memory, if you’re making use of that now.

M3 is not available in Studio. We’re not in a position to speculate when or if that might change.

Everything in computing that you can buy now is either already obsolete, or eventually doomed. Always has been.

If you’re doing app development for the app stores, you’ll either need the newest macOS, or (for part of the year) the penultimate macOS. Otherwise, whatever works for you, works for you.

We have a 2013 MacBook Pro. It can only run up to macOS11, so it kind of dropped off Apple's upgrade list a few years ago. Nominally if Apple continues to make a new macOS every year you can figure upon being able to run the newest macOS for 8 years or so. Of course then the question is, do you feel you always have to run the newest OS and have to run out and buy a new computer the day yours drops off the list? It really depends upon how you use computers and that is very individual. Apple will say you should always run the newest macOS, but will keep issuing various kinds of updates for the last 2 versions or so. I use mainly third party software so on my computer I don't care if Safari is 5 years out of date. THe browsers I use are still being supported (for a little while at least). Anyway, I could go on, but when you ask this kind of question here you will get dozens of personal takes on this and it is best if you outline your usage as closely as possible if you don't want dozens of rambling replies like mine. ;-)