The well-known repair website iFixit has now released a new comprehensive teardown video that illustrates the better repairability of Apple's 2021 MacBook Pro, but also confirms a few annoying restrictions.
https://www.notebookcheck.net/iFixit-s-teardown-video-shows-the-internals-of-Apple-s-new-2021-MacBook-Pro-and-confirms-its-improved-repairability.576159.0.html