I am not sure that this will happen in the third quarter of this year, the developers will find some kind of mistake and will continue to refine it for a long time, in the best ways.I also understand all the pain of Ethereum miners, because this is the most profitable coin today.
I share your opinion. How long has the launch of PoS been delayed? It will be postponed again. Actually, I saw a PoS Ethereum review somewhere and there it was said that considering all Buterin's previous statements, as well as already published developments, PoS transition should be expected not earlier than the middle of 2023. Unfortunately, I can't find the source of this research.
The speculative part of the statement that it is not worth investing in mining equipment is also alarming. If they don't launch PoS this year, it will be extremely unprofitable to follow such advice.