I never use TFA if it's SMS based. I don't understand why every company isn't using the standard TOTP TFA with a secret key, that way I can manage who has acces

I never use TFA if it's SMS based. I don't understand why every company isn't using the standard TOTP TFA with a secret key, that way I can manage who has access to my TFA codes very easily. I just scan a barcode on my phone once and I'm able to generate TFA codes for myself, what's better than that?