>> Like running your own power plant to serve your factory

With newer power technologies becoming more affordable and effective, solar, wind, & storage are increasingly being used to power factories and other businesses.

It's all about control of your product and operations. If it is economically feasible, it's always better to control your own stack all the way down.

Does serverleds actually deliver better control over your development, portability, reliability, security, etc. for your application & situation, or not?

This sounds a bit like the "When will they turn off the last mainframe?" arguments a while back - I wouldn't expect servers to disappear either...