There are not benefits since they break software. You can get pretty much all of these by just removing remaining 32b software from your system.
1) Just removing all 32-bit apps doesn't recover the disk space used by the 32-bit versions of frameworks, and
2) If you remove all 32-bit apps, then there's literally no point to retaining the 32-bit OS support anyway.
1) Just removing all 32-bit apps doesn't recover the disk space used by the 32-bit versions of frameworks, and
2) If you remove all 32-bit apps, then there's literally no point to retaining the 32-bit OS support anyway.