You’re right that most of big business would want to have their own authentication system, mostly because they have ressources (developers) to maintain and evolve it. Most of them do support other Identity Provider though so this is a bit hybrid mode in this case I guess.
Vendor lock is almost inevitable one way or another (except if you are Google 😅) so this should be taken with a grain of salt IMO.
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You’re right that most of big business would want to have their own authentication system, mostly because they have ressources (developers) to maintain and evolve it. Most of them do support other Identity Provider though so this is a bit hybrid mode in this case I guess.
Vendor lock is almost inevitable one way or another (except if you are Google 😅) so this should be taken with a grain of salt IMO.