Ethereum is the first platform-project among cryptos. But it wasn’t so long ago for them to create the competition. All of them tried to fix the issues or copying the successes of Ethereum. We saw many Ethereum-killers in 2017. Now we know this isn’t an easy ride, and other projects just slowing.
Developers left the Tron, EOS, Komodo tokens. They are joining the Polkadot, Cosmos, Avalanche. The reason is simple, these latest three works on the blockchain-interoperability. They have bigger chances for the future than standalone networks.