As discussed many times before, there is no OS that is best and none that are more standard than others. A good answer really depends on a good question; i.e. the better the question is the better the answer will be.
The question itoo ask s 'not is what is more standard' ; but 'what do you plan to do with your computing infrastructure'; who do you plan to do it for?; what is your budget? your education? your prior experience in IT? There are many factors in selecting a platform and there is no 'one-size-fits-all'..... as we find out in life, technologies that try to be all things for all people often end up as nothing for no one
BTW: I started on HP-UX in the 1980s, and have worked on SUN, IBM, SGI, ATT, and most all commerical UNIXes; plus Linux since 1993. I like them all, but tend to use Linux for servers and MS laptops loaded with commercial client software for clients.
This forum, for example, runs on Linux services with Apache, PHP and MySQL, however; I remotely admin from a Win98 laptop. They are both wonderful for what they were designed to do
In this forum, threads like 'this is better than that and other IT religious discussions' are promptely deleted, according to the rules.