> Additionally, registering and configuring your app at Apple / Facebook / Google etc. is non-trivial. I know what I am doing in theory, and I have already invested a week of time in configuration and approvals and updates.
I don't feel like it's worth giving up control over your user's authentication to an intermediary in return for saving a week of work. Maybe the case could be made for day-1 of a startup, but certainly not year-1, it's just too critical a component.
I'd also challenge this taking a week. Apple/FB/Google sign-on is pretty straightforward, and I've found the cost is mostly in setting up an open-source auth library in my webapps rather than enabling a given service provider.
I don't feel like it's worth giving up control over your user's authentication to an intermediary in return for saving a week of work. Maybe the case could be made for day-1 of a startup, but certainly not year-1, it's just too critical a component.
I'd also challenge this taking a week. Apple/FB/Google sign-on is pretty straightforward, and I've found the cost is mostly in setting up an open-source auth library in my webapps rather than enabling a given service provider.