You forgot those of us who have been around long enough to have survived major sea changes like os390 -> UNIX -> Solaris -> windows -> linux. Systemd saddens me because it makes servers act like workstations. And sadly, the distro maintainers made way too hard of a turn into systemd, forgoing 20 y/o standards. For example, on a CentOS minimal system, no ifconfig/netstat? Instantly breaks monitoring tools.
So if I need to retool my infrastructure, I am now looking at the options without a "linux first" mentality. This is the first step of slide into OS obscurity. I know RHEL/CentOS != linux, but they own the "enterprise" and have the mindshare of the check writers. So when things start randomly failing and require money to fix, there will be discussions around replacement and mitigation.
The only ingredient missing is a new upstart disrupting the OS land. It would have been awesome to see Oracle pour development into Solaris x86, because the vacuum is starting to form that they could have filled.