Is Linus still checking every commit?
That‘s what subsystem maintainers are for.
That's a big ask for those maintainers who are volunteers
Do people still think that Linux is being developed by unpaid hackers in a garage?
Most, if not all, are employed by different companies or Kernel.org.
Linux is big business.
It's a big ask to expect people to do the thing they volunteered to do and can step back from doing any time they want?
Only if he finds something odd in the pull request summary.