Good questions! I’ll hit em short now -
Definitely. Most bass no need pedals.
Could be a long answer, but a lot of preference. I like individuals for fun-ness WAY WAY more. Some multi units are kind ‘jack of all, master of none’, but some are amazing like Eventide H9 of course.
Yeah ugh it sucks. I use a Templeboard and the adhesive is constantly failing, thinking of switching over to Velcro. The alternative to either - zip ties! Not so secure/permanent, but good for trying stuff out without commiting.
Works, but only if it’s a really good one, like TC Electronic or Petersen. No Snarks allowed on my gear. 