It needs to be done. Your team is full of aces to get you this far and you have an industry of professionals who rely on this software and support you to the end!
Apple is losing it's grip (#DongleGate), Raspberry Pi's are $35 and approaching fast, massive projection gigs need lots of projectors, and ports, but don't have time for archaic severs, walled gardens, and unsophisticated mapping methods.
I know you could, with sincere effort, port the existing version to PC and also to Linux/RPi. The MiniMAD is just the tip of the iceberg and should be continued in earnest.
With this, you could easily keep your core competency and value to "mapping". However, when you open up more machines to play with (think larger PCs with lots of DisplayPorts or smaller systems ready to be installed permanently or constantly adapted to different projects). Maybe integrate a few sensors or communicate with other stuff.
Looking at every other piece of lighting software I still think you have a leg up and from a user experience standpoint you have done a much better job - although not perfect. Still way way better.
I hope you sincerely start working on the PC version. Just take a look at the discussion over on the Apple forums about the dongles not working and the whole USB C thing just throwing a wrench in everyone's adapter and cable work flow. This stuff is essential and means business! And honestly I do not think that Apple "gets it" anymore.https://www.apple.com/shop/reviews/MMEL ... age=0&rf=1
Thank you sincerely and with the most respect,