Actually on servers RHEL is still the default (43% server OS market share), followed by Ubuntu at 34%, Debian at 16% and SuSE at 11%.
https://commandlinux.com/statistics/linux-server-market-shar...
https://commandlinux.com/statistics/linux-server-market-shar...
Not sure I'd put any weight whatsoever on those figures!
(and how would they even compare a commercial offering with something like Debian that doesn't even have popcon enabled by default?)
At least the infographics down the bottom are obviously full of slop