Agree on "most of the time". There are of course exceptions, like the famous BaseCamp story.

You’d be surprised how wrong you are. Most startups base their value proposition on the fact that by buying saas instead of software, you don’t have to pay a guy for infrastructure, maintenance and system administration.

Which makes totally sense for large organisations but less sense for small ones where it could be easy to manage most services off a single box, provided that regular backups are made.

Consider git alone: you can run a small gitlab instance for free. You can do ci/cd off a jenkins instance. Ticketing systems are one of the oldest things around.

Some basics of system administration is all you need.

Couldn't agree more ^^^