I never take that option if there is anything else available. They don't need to see my signins on other sites, why should I just give it to them? For a few sites where it is utterly unavoidable I make one-off twitter accounts instead, because Twitter doesn't require your phone number to make an account and doesn't have a "only one account per person" policy I think.
1. It’s fast
2. It gives you a pseudonym
3. It doesn’t leak all your other social graph data
4. Doesn’t require a new password
The rest are:
1. Faster than creating an email, but will require redirects, and possibly logging into fb/google
2. May give you a pseudonym but often reveals your real name
3. Are used typically to build profiles of you and create stats on app popularity across demographics
4. Don’t require a new password.
I know they're very popular, but there's so much long-term unintended baggage with using these singe signon systems...even assuming Apple's doesn't have the nefarious parts most others have.
Over here, I just use Face ID and 1Password does the tedious filing-and-remembering part that computers are good at.
It's also easy in general to revoke permissions with these SSO providers rather than dealing with whatever the service's account cancellation protocol is.
And... 90% of the time, that's what I do, because I prefer to have separate logins for every site.
But sometimes, I just click the 'sign in with google' because it's a hell of a lot faster and easier.