"Energy" is also a "language game war" between internet posts on physics and professional physics.
> This–and TWIM jhanas in general–certainly involve the arising of the relevant jhana factors.
Yes. So someone suggested calling them "mindfulness of the jhana factors". Also the word for joy in several languages is "piti". We can talk of joy and happiness, and see it's not the same as jhana. Is any joy and happiness from non-sensory wholesome states jhana? No.
> People feel real and somewhat life-changing experiences of piti, sukha, equanimity… are those, due to limited concentration, below some critical threshold to earn the name “jhana”?
Yes I don't want to dismiss these states they are wholesome, just not jhana. Do cultivate joy in wholesome states!
> Besides, it’s not even entirely clear that the earliest texts are actually describing something all _that_ much more concentrated than Nadia does
Well, how do the early texts describe the insights that happen as a result of jhana? they are quite deep and quite challenging to conventional world view (just like if someone did an excellent physics experiment). Consider AN 9.42... senses disappear to the mind at the first jhana https://suttacentral.net/an9.42/en/sujato