I got a FM4 Version under Windows 10 running - there are customers with FM3 or FM4 who want to migrate their solution...
There is also a FM6 on that VM besides of current versions - so we can do the migration on one machine up to FM18
Not that I would run solutions that old for my business - but it feels good to be able to run older versions on an os...
And often really helpful if a customer claims that something does no longer run after the upgrade (often, the old solution was the same...)