If you can feel a very small tinge of existential horror when you read the words “try to”, congratulations, you’re a true *nix devotee.
If legislators get grumpy about this, just gently thwap them with your handy copy of The Unix Haters Handbook and tell them you’re working as hard as you can under the circumstances.
Akahually at my work we used a third party authentication PAM module that uses the gecos field for username mapping.
Looks like your company shall be sacrificed for standards compliance reasons.
The funny thing is, mergers basically aim to create monopolies, where on a long enough timeline a few handful of people have control over the whole financial system and the capacity for production. Kind of like under communism, except instead of elected leaders it’s held by a totalitarian elite of private citizens. So, also kind of like communism.