While there's definitely always a cost to consider when running a server, I think a good portion of that cost can be reduced with the right tooling an expertise

While there's definitely always a cost to consider when running a server, I think a good portion of that cost can be reduced with the right tooling an expertise. That's not to say that a experienced team can run an infinite number of arbitrary services without cost or anything like that, though. There may be a select few situations where the cost of deployment and maintenance is negligible, but that's going to be the exception rather than the rule.