Well those are a niche market anyway. I remember the problems that came with those already when moving to NT4/XP. Soon that stuff will get hopelessly outdated.
What you call a niche market carries a lot more weight per unit than home computing does. Anytime a product is used to make money, that product becomes a lot more valuable because you can't just up and change equipment without downtime.
All of my customers just continue to use old computers, and buy old computers when their fails. The cost is usually too high to allow upgrading because upgrading a front end that resides on a computer usually means replacing all of the control system components so that $500 workstation won't do it's job unless we spend $200k on a new system since it won't work with the one they have. My wealthiest customer still sources replacement electronics that are out of production from what I take out of rural schools that we retrofit. All 80 or so computers on that network have been out of production since 1988 and to get the system to work with a XP front end we had to void the warranty on our own product to get it to work.
If you want a computer for an industrial application there are certain things to expect.
In my experience it's always been this:
1. You may have to uninstall windows service packs
2. You must be using a particular version of java that is no longer current
3. You must be using a particular version of Internet Explorer that is no longer current.