One thing is definitely for sure...

[Winfred]

I currently play with a drummer who doesn't have his kit set up at home, yet he usually nails his parts and adds neat flourishes at rehearsal where he uses my e-drums. He once told me that he learns songs on his steering wheel. I have also played with drummers who had multiple kits at home and still struggled with songs that had been on our set list for 6 months.

Yep. Currently playing with 2 drummers that do that. Both are in their 50's. They listen to the songs while they're working. They sometimes miss small details in songs, but honestly they don't miss much. They show up and play it almost like the record the first time. And after a few more run-throughs, they nail it.

Keep in mind, these are all cover songs, and most aren't what I would call complicated.