The funny thing in blockchain "industry" now that some people are even calling new projects using "blockchain 4.0",,, when to me in reality, Bitcoin was the blockchain "original" and maybe if we want to argue Ethereum is making the type of next 2.0 because of much more capabilities for smart contracts and cross-chain.
I do agree we still can consider it new though because adoption has not happened.
It's even funnier when you see that the 2.0, 4.0 etc. versions aren't even introducing anything new or innovative. It is all repetition of the old ideas dusted off and represented as new. The funny things don't end there either, in most cases the newer versions are weaker and with more problems. For example Ethereum 2.0 is going to switch to PoS and make it weaker while giving ultimate power and money making opportunity to the ethereum foundation and Vitalik so that they can get paid constantly for doing nothing, just because they hold the 72 million premined ETH.
Yes,,, we live in a world where supposedly this is the cutting edge of technology but almost every new project actually has just a copypasta team behind it with 90% of the team on marketing and PR and "influencer" and maybe 1 guy who can copy github code with no real expertise or skill to actually introduce something new or even something useful. The whole 2.0 and 4.0 thing is pure marketing that hopes they make people forget the whole point of why blockchain and Bitcoin was so powerful in the first place.
I personally thought this proof of stake argument was dead with ICO era POS coins but I guess it is also a rich man's game with rich people happy to take idle profits,,, so much for the idea of "liberating" crypto.