Thank you for your insightful and detailed response. Perhaps you should make it an article on its own :)

I don't think your username is an example of one that is limiting. Limiting usernames would be ones that are about specific topics (travels, crypto, photos, music, kids). Limiting usernames are also not a bad thing, but they would never work for someone like me who wants to write about everything.

That's interesting that you don't even look at the names and just look at the comment. I'm starting to adopt that approach and thus so far I've made good friends with people both with "real names" and usernames.