Anything I touch that requires sysadmins is outsourced one way or another, either via managed services like rds or in house dbas.
If aws or in house dbas have strong opinions about systemd it doesn't impact me.
I mean, this is a laughable point. Like, seriously ? Before systemd every branch of the linux distro tree had its own way of managing stuff at startup, and distros in the same subtreee made things different enough that things like inits-cripts were not portable.
Heck, even with the same init system, some distros arranged runlevels differently. Do people even remember runlevel? Those were another complete way of mess things up.
Are you really playing the "non standard" card? Like, for real?
And seriously, what would be the standard? The Single Unix Specification? According to that spec even bash is not standard, and yet it's the de-facto standard for shell scripts across basically all the major distributions.