And than you bet on the wrong ditro. I do support work for a commercial Linux Desktop program. We went from SuSE, to CentOS, to Scientific Linux, to Ubuntu. Lets hop Ubuntu stays. :-) Our "luck" is every five years or so we exchange the machines.
They used 30 years the same Windows version. So maybe they can use 30 years the same Linux version. I don't know. All I know is, choosing Linux is the opposite of choosing stability.
I would argue that a close-source (at least before the leak), non-supported kernel is way more unstable and risky than an open-source, still maintained one (some kernels are actively maintained through 2033).
Bear in mind that the position was not about developing/maintaining the OS, but the applications that run on it.