I agree. Case in point: The site installed and ran well when I forgot to use ...

I agree. Case in point: The site installed and ran well when I forgot to use the new StatementTrait in the \Drupal\Core\Database\Statement class. I then realised I was missing it. I added it and created the patch in #13 (which failed manual testing).

I wonder if it would be better to refactor after making it work with PHP 8 or how much refactoring would even be possible in the current release cycle. I would at least want to move away from the current func_get_args() logic which now gets repeated in multiple places in the patch.