Proton has a similar feature (not sure if it's part of free or premium as I subscribed for proton ultimate so it just came with Proton Pass). It's honestly crazy how nice having TOTP right in the extension for the account's entry in the manager.
Also, I realize this is like the third time I've made a comment about Proton, so I'm probably gonna stop before folks think I'm like a shill or something.
This is so confusing. Are you saying "classic nerd" is negative then? Your wording is kind of ambiguous. I don't think "nerd" has been watered down, just isn't very negative in the mainstream. I'd say it just means you're very enthusiastic about a certain topic. I don't think folks would call someone who just plays one video game a nerd, unless it's only one video game and they are super into it, like a "WoW nerd" maybe.
I don't think there's any need to gatekeep "nerd" though and require any additional qualifiers on it like "classic". Just seems like you're trying to say "actual" without sounding elitist about it.