Even just having the optionality with energy is a big win. Large upfront investment but in a world where stocks are a poor place to park cash, whether you mine or not, it will basically be paying a perpetual tax-free dividend

Agreed. But also beyond Bitcoin, ie in the developing world to remove some of the risks around using other fuels (ie solar charged battery lamps in place of paraffin).

I think I recall that WBD were going to investigate using a stranded solar farm for mining in the same town as their football team. (Although my conspiracy theory brain has me suspecting that solar farm was put in / earmarked to help remove infrastructure objections for a planning application currently in the works.)