And just to expand on that, I'd like to (for instance) run multiple remote desktops (including a photo editing station), probably a decent plex/emby VM, probably something to do transcoding etc etc. Not to mention dev VMs etc.

You can do a lot with one thing and administer that one thing without having lots of individual boxes doing stuff, and for me it'd be way faster and a single cost, so it'd work out as a big improvement.

In a 'money is no object have all the time in the world' it would probably be better to have something dedicated to do each task, but that's not that flexible on top of the other drawbacks (cost in money/time).