I'm surprised Thinkpad = barely the winner for ease of access... it's been a while since I've owned ones but those things used to be really great (well made, upgradable, etc..)
Discussion
Thinkpad: 7 screws, six plasic snaps (nubs that tend to break/wear)
MacBook: 5 screws (but minus points for being pentalobe) and 4 snaps which are designed to be reused (finger/gripper style). Minus points for having to slide bottom forward for release.
It was really close in the actual experience tbh, but without an electronics screwdriver kit with a P5 bit, would make things very different.
Sounds like they've gotten a bit cheaper in the last few years, then :( but yeah, from a consumer-friendliness point of view needing to buy extra kits does bug me. I kinda like being able to macguiver things just with what I have on my keyring knife.