Some time around mid-2012, at two different higher end of software development firms, the target system for 90+% of clients was some open source language such as Java, Node, Python, Scala, Ruby, targeting some Linux. At one of these our DevOps went ahead without even really being asked to at least monitor that our builds ran successfully on BSD and illumos, and occasionally patch as necessary.
For clients asking us to work on .NET there was a premium charge and ZeroMQ was used to "bridge" .NET with something else. The only clients that successfully insisted on pure .NET did so by paying a bigger premium charge.
By 2018, we were doing heavy sideways discounts on ".NET core for Linux" in the form of heavy premium charges for the alternative.
> Good luck trying to get on the corp network [with] ClownStrike Falcon crap.
This is what a virtual machine is for.