Capital equipment isn't free, nor is maintenance, and equipment has a usable lifespan.

So even "free" energy isn't free.

That this isn't reflected in your language doesn't encourage one to bother paying attention much longer. Usually when things start out this way, it's ever increasing unproven speculation and disproven nonsense thereafter. It's not very hard to distinguish yourself from that (large) crowd by scrupulously making sense, unless you are inextricably part of that crowd.

Regarding the extent of the universe, Ethan himself wrote on the topic: https://www.forbes.com/sites/startswithabang/2017/10/14/ask-ethan-is-the-universe-finite-or-infinite/