I'm not the slightest bit unnerved by your comment. But if you feel like answering the original question I posed then I'm all ears.

Even if I indulge your fantasy for a moment - Linux (amongst other systems) has provided myself and many others with a solid career for the better part of the last 25 years, daily security patches from vendors and all, and I don't see any solid evidence of that changing before I retire.

Further I suggest most Linux people would be able to adapt if the world were to move on to an improved competitor with enough momentum to be adopted en masse - which hasn't happened.

That has nothing to do with its technical capabilities, rather a free beer UNIX clone, that is all.