I work for a large consulting company (300k+ employees globally) and 99% of our internal resources are all secured by Ping. One identity and MFA app. SSO between just about everything. The client I'm currently working for with that company has all of their auth handled by Entra. All their internal docs, their azure subscriptions, their gitub repos. All the same user identity. Shit IT isn't inevitable. It's a decision, or often lack of a decision and result of "organic" growth.