I do not think Hashgraph will be as popular as Blockchain. Most of the members in the electronic money market believed in blockchain. There will not be a revolution that could overthrow the blockchain technology.
In my opinion, Hashgraph will not be enthusiastic welcome and will not be interested investors. That is the truth and you should accept it.
I do think that depends on the fact that PoW blockchains arenīt scaleable right now, but sure they will if lightning network and other things are realesed.
Also PoS and DPoS are good mechanism, but can they run the full transactions of the new york stock exchange and visa transactions on one blockchain ?
Thats whats Dan Larimers critism on Ethereum, that its slow, PoS changes what ? Its reducing energy cost because there is no mining, its more efficient, less cost intensive, more democratic (but those with lot of stakes have bigger consensus). But can it transact more than 100+ factor transactions per second than it is now ?
Point me out if I am wrong with that.
Good the Raiden Network can speed up the Eth network a lot, but its an addon, intrinsic technology is not changed.
Thats the thing where tangle and hashgraph have some big opportunities if they are faster than the first and second generation of blockchain coins like btc and ethereum.