I remember the day I switched to Authy because it would not vendor-lockin me for #TOTP codes. Alas, today is the day where I ditched it because Authy - without warning - stopped supporting the desktop app, even hurrying the deadline by 5 months! That was 70% of the total notification window as far as I could tell.
Requiring a mobile device for #2FA#MFA is not quite the same for me, and it can get lost (or stolen) way too easily for my taste.
