Well when you have 5 vendors that sell five different product line that require varying levels of licencing you need vms to keep everything separate. For instance there's extremely old Allan Bradley equipment out there 30, 20, 15 years old you need vms to store those softwares on them so you can communicate with old equipment. You need it to keep customers separate and you need it so you can just stop the virtual machine if there's any issues within the environment you've created. But....it's still just on a laptop for the field stuff. It's just an extremely expensive laptop. When I'm sitting in my shop we have a virtual environment that I can log into and do what I need to. We still have clunky laptops you're honestly not going to come sweeping in and replace that aspect in the near future there's to much old shit out there still. I mean hell I just worked on a GE 90-30 that's still in service this week. That's....older than most people on Reddit.