> adding TOTP support is going to be fairly trivial ... This does require the user to install a TOTP app You just lost 30% of your customers. > It isn’t that

> adding TOTP support is going to be fairly trivial ... This does require the user to install a TOTP app You just lost 30% of your customers. > It isn’t that hard to fix You're highly underestimating the immense difficulty of convincing the entire human population to do something that engineers consider trivial.