There are too many such blockchains at the moment and all these blockchains are trying to pull funds into their blockchain. There are popular opinions that many of these blockchains will not be needed when Ethereum is ETH 2.0. I think that one should definitely not forget about this opinion.
May be the sidechain project will have nothing to offer as soon as eth2.0 kick off but who knows if Ethereum will carry them along.
The layer one projects will remain solid irrespective of what eth2.0 brings because there are some aspects of sharding that other layer 1 projects are still competing with each other. By the way, there should be competition between this project so that we can have option to choose from any of them.