But you can get an M2 Ultra with 192GB of UMA for $6k or so. It's very hard to get that much GPU memory at all, let alone at that price. Of course the GPU processing power is anemic compared to a DGX Station 100 cluster, but the mac is $143,000 less.
You want to buy a bunch of new equipment to do training? Yeah Mac’s aren’t going to make sense.
You want your developers to be able to do training locally and they already use Macs? Maybe an upgrade would make business sense. Even if you have beefy servers or the cloud for large jobs.