But of course! Our major telecomm company in Alaska uses lots of mountain top repeaters with multiple modern generators of various sorts... each of them also has an old air-cooled Lister HR as the final fail-safe device to be able to guarantee no significant down-time.
When the chips are down, they know they can count on the old Listers to always perform.
There are backups, then there are fail-safes.
dieselgman