That's my setup and I was thinking exactly same; Mini M2 Pro with 32GB RAM would be perfect for me. Except that I don't have too many complaints with my current machine which I feel can easily work just fine for at least 2 more years.
I really just use my machine 95% as a tape machine with few plugins or edits. So as long as I can get 64 tracks of in/out reliably with 128-sample buffers (or lower) then I'm set. I just haven't tried that out in my new studio yet, as it's under construction. If I can do this, then I'll skip the upgrade for now.