The title is certainly clickbait. An ARM based Mac Pro is certainly not Vaporware. They've missed their internal targets, I'm sure, they missed their stated promises of having all ARM based Macs but not vaporware.
I think the issue is what is a Mac Pro in 2023? The trashcan Mac was largely a failure because it lacked GPU upgrades, no drive bays, and was thermally restricted. Apple expected any and all drive expansion to be done externally via thunderbolt. Mac Pro users rebelled and many largely avoided the trash can Mac Pro. Apple rectified the situation, with the latest Mac Pro, but what will Apple do now?
Apple's current architecture is such that there's no mechanism for a discrete GPU, and no drive expansion, other then a second NVMe slot in the studio (that they prevent the consumer from using) and no ram expansion. Will they repeat the mistakes of the trashcan and offer a Mac Pro that has very little internal expansion options?
With a price tag starting at 6,000 dollars will professionals want or expect to have ram/storage/GPU upgrades?