I have an m1 mbp and I have a 2015 sitting around somewhere and I can't really tell the different between to two. I skipped over the butterfly generation thoug

I have an m1 mbp and I have a 2015 sitting around somewhere and I can't really tell the different between to two. I skipped over the butterfly generation though. The performance improvement on the m1+ just make it a no brainer for me though even if I hated the keyboard I'd carry around an external one just for the extra power.