and, its so cheap. there are alternatives for individual components, but nothing that comes close to being this low cost. And, the ultimate value is that if you buy a niche tool (like notion) then only people with licenses can use it. Everybody at the company has office, so it's easy to share/collaborate. You have to really commit to avoiding office at all if you're going to replace parts of it.
Cheap is the same reason I ended up on an M365 family plan before they stopped allowing custom email domains. I'm grandfathered in, but I will probably end up paying more for just email when they decide to cancel the feature, plus needing to find a place to stash my off site backups.