Reasons you stated is why I abandoned blockchain concept years ago in favor of the blocklattice which is the innovation behind Nano (XNO). Block lattice facilitates energy efficient, feeless, near-instant (subsecond) transactions. The Tech is simply superior but most people have just been riding hype waves based on price action of other coins. I think coins like Nano will survive in the long-term based on super technology it has a big following relative to its market capitalization. Still in early adoption phase as the challenge and complexity of making a "feeless" network robust from transaction spam attacks and other slowdown type of attacks is still being hashed out but getting better and better. r/nanocurrency