* Energy decline is accelerating.
* Perf-per-watt is stagntting (hence the comparisson of RPi @ 28nm vs M1 @ 5nm).
* This trend leads to economic decline (Note: I don't understand why, maybe it's explained but I didn't get it).
* Eventually hardware won't be replaceable.
* Software should be improved to get better efficiency (Note: I'm not sure this is a claim made by OP, but it's something I understood).
Edit: having taken the time to summarize what I understood from the comment, I must say I don't quite agree. The RPi vs M1 comparisson seems way way off, they both have a similar power envelope but the M1 has about 10x better results in various benchmarks. I don't agree that hardware won't be replaceable (save for a civilization shattering event, which is not what we're discussing here).
I do believe software _could_ be more optimized, but then again I'm not sure that's a point OP was making (they did mention something about "software gatekeeping" which I took that way, probably misunderstood what they really meant). Now that I've thought about this some more, this is probably something I conflated into OPs post based on my opinions.
I'm not quite sure what to think about energy decline. I think they meant about using more energy for things that used to take less energy before? If that is the correct interpretation, I'm not sure what we're talking about. On micro scales (eg: computers) I don't think that holds, but maybe it is happening on macro scales (eg: large industries). But even for macro scales, I think there's been a shift to efficiency, if only to reduce energy costs. Then again, that's not an area where I have the faintest idea, so maybe I'm blatantly wrong and OP is right.