[ozim]

Unfortunately companies cannot afford to build messy environments.

Fixing small issues, on-boarding new people, explaining existing setups to already employed, adding new servers. That is nontrivial amount of money burned there "day in and day out" when networks are monoculture with centralized access. Making it a little bit of this flavor a little bit of other, will make those costs grow 100x in no time. This way you have 100x operational costs to prevent something that may or may not happen.

Having messy environment also brings other risks like some operator might mess up easier because of being tired fighting that mess.