Yup, these rich corporates will redefine what mining is, a long time ago, there was 3-5 months ROI possibility on many gears (both in BTC and $), now the minimum is over a year, eventually, it will be like any other business where nobody including those big corporates can hit ROI in a few years.
Power doesn't seem to be limited over there, money isn't limited either, it seems like the only real bottleneck here would be the manufacturing speed, current hashrate estimation is 223EH, a 5% increase is 11.15EH, which translates to nearly 111,000 S19 pros, to make and deploy that amount of gears is unsustainable IMO, we will have to slow down very soon, but we will never stop growing.
The days where one could buy a Radeon HD 7970 and pay it back in 30 days on DOGE, or an Avalon that paid for itself in 4 months are long gone. ASIC mining will have the same return as any other business, which is 5-10% per year. GPU mining returns seem to be falling in the long term as well. The last of the glory days was summer 2017 where I could buy RX 480's for $300 which made $6/day of profit. Now I think the return on GPU mining post-PoS will be 20-40%, which is fine, but much lower than usual.
The U.S., especially Texas, has a large population that consumes a lot of energy per capita. In Texas everybody has big houses with a lot of A/C that use lots of energy. The grid can handle gigawatts of power and the deregulated energy market is very efficient.