The Microsoft-focused IT company I've effectively replaced was incredibly condescending about our decision to change direction, after their entire stack fell apart during the cyberattack last December.
I think there are going to be a lot of stubborn, highly certified IT professionals who'll have to accept that there's more than one way to build reliable infrastructure.
Apparently, I shouldn't be using Proxmox because "it's only for labs."
Meanwhile, I'm building an infrastructure that's more resilient, easier to recover and designed to keep the business operational even if we're attacked again. If that means temporarily running critical services on a cluster of ten Dell Wyse thin clients, so be it.
I'd rather have a flexible, recoverable infrastructure than an expensive stack of enterprise products that looks impressive on paper but falls over when it matters.