Might not work in all cases, but really, if you're trying to sniff out a pretender vs someone who can write software, would not having a heavily technical conversation about details, challenges and other things not make it clearly evident after 15-30-45 minutes if this person is who you need? Rest of the time can be spent napkin designing something or peer programming to check off those to be sure.
I had a interview in 2021 where I had to do a 1.5 hour timed exercise, that apparently isn't sufficient, so their interview pipeline has 3x1hour additional live coding sessions with engineers. Over 4 hours of coding just to prove I can write code up to their standards. Then another 3+ hours of behavioral interviews, meeting the team. Multiply that by the ~5 candidates you interview per position multiplied by each position you hire for in a given year.