I have encountered it -- but, the way I read the original post was more about individual usage rather than computer license, e.g., I don't need a license for every computer I have my personal copy of BBEdit installed on, because they're all "my" computers, even including my work computer. And, any computer or device that uses my Apple account can download and use applications purchased on it.

I believe that latter condition is actually true for Microsoft 365 Personal[1], too -- it's tied to your Microsoft account, and the one "seat" you're buying is that user, regardless of the number of devices you have. Business editions tend to be licensed differently.

[1] I know that looks like I got the name wrong, but apparently in April they changed "Office 365" to "Microsoft 365."