To my understanding, we now started something called ice age period where difficulty bomb becomes harder exponentially and this was implemented to make sure everyone switches to new PoS chain when it is out.
However according to recent articles PoS will start off in hybrid mode where 99 blocks are still validated via PoW and 1 is validated via PoS (again we can never be 100% sure this is the case, but it looks like it from what I've read). This means we will still be able to mine for a couple of months until PoS is fully implemented.
My question is: the hybrid stage of PoS requires hard fork, will this hard fork remove difficulty bomb and will another difficulty bomb be implemented to account for next step of PoS transition, or will it be possible without hard forking again?
Subsequently, it seems like Casper is still in development, what happens if it is not ready in time before difficulty bombs effect becomes too hard?