On Reddit, people are debating the subject as well.
Someone said: “At some point, the Monero code will be so well-reviewed and ossified that its opacity will become moot regarding lack of audibility. I honestly think Monero will attract more work regarding pow. You gotta remember it’s not hashes per second that matters, it’s joules per second. Hell, Bitcoin hashes per second could be throttled if the state start blocking the ability to manufacture Asics.”
Somoene else said: ‘Yep, this is a key point – it’s joules per second that actually matters; hashrate is only a rough surrogate for that. And even if the absolute energy sunk into Monero mining never matches BTC’s, it is surely going to be more broadly distributed due to the prevalence of commodity CPUs for mining.”