Be calm, ETH going proof of stake isn't finalised yet I'm expecting some kind of hybrid functionality where by PoW algorithm and PoS works in one box, we've seen few projects utilising such use cases before so lets wait till the time gets here and see what the final decision will be.
Yeah! they cannot sacrifice their hard work by suddenly making it just like that because if ever that will happened, it will be sure a huge loss for them, and they will gonna regret it if some project will be managed to get their position in the crypto industry by putting all the features the investor wanted in their platform. right now it's just all about planning from the Ethereum teams we might not see the full roadmap of it for the next months to come until they finalized and reviewed it.