Who's paying the $50k? I don't see how it makes sense to pay that much for a home-grown setup when I could pay <$5k/year total for both of the two best frontier models at effectively unlimited usage.
It would've been easy to spend $5k on Fable in the short week it was available. If that's the direction things are going (we can assume GPT-6 to be if similar class) $5k's not going to get you "best frontier models at effectively unlimited usage".
A 16C Ryzen 128GB with 96GB Blackwell is ~US$16k, quite reasonable for a worker billed at $300k. In fact so reasonable it's worth having AI enabled backend for lots of things.