That's somewhat true for team collaboration, but not if you consider individuals on teams. There are people at least 10,000 companies using Obsidian, and some large corporate sponsors. See obsidian.md/enterprise
I'm an "enterprise user" of Obsidian, but all I use it for is personal note taking at work. My company shows up on that page because I get them to pay for a commerical license. Outside of that it isn't an official internal tool. I don't use it to work on projects together with my teammates, for example.