One of the most moronic things I've read in a long time.
Try not being an idiot and change it. The reality of your situation is that you can act. You're just lazy or ignorant or prefer to just complain.
Sure, I can take the moral high ground and live on unemployment.
Tell your vendor that if they don't get off Windows onto Linux then you will leave as a customer. If there is no alternative AT ALL, then take another job.
Except the reality of the situation is Windows is not that bad to lose your job over. Moreover, I'm one user of one of our dozens of systems that run this software, and we're one company of hundreds that use it. The company is very good, but I'm doubting they'll throw away their cash cow because I'm complaining. Again, you really don't get the reality of most people's situation. Let's say you're an X-Ray technician, and the software you use, which is the industry standard used at 95% of the hospitals, runs on Windows. Do you take the moral high ground and throw away your career just because the excellent software you're using runs on Windows? Good luck with that.
This isn't A Knight's Tale and you can't change your stars. Get over yourself. If I was writing website back ends (and sometimes that's the work I do), I insist on Linux because I can. If you're running Adobe AfterEffects, you have no such luxury, and Adobe doesn't give a f#@ what you think, and your company just wants you to get it done with the tool all the other artists are using that they've already paid for.
All this grandstanding the Linux zealots are throwing out there doesn't take into consideration that, in reality, Windows isn't THAT bad to lose your job over. Most of us are grown up enough to deal with it. I have a preference - I prefer Linux when possible, but I'm flexible enough to use whatever they give me.