I believe we recently started a period where difficulty bombs in ETH will have substantial effect, but it is surprisingly hard to find throughout explanation about this online, hence the question.
How long will it be now till there is no point in mining ETH and what can happen if PoS doesn't proof itself i.e. will this bomb be defused or ETH just goes down a lot in value?
Will miners move to ETC mining if they don't want to stake ether, which seems odd to me now as there is not clear future for classic as far as I know.
I will appreciate expanded answer, as this is genuinely interesting to me.