all the other platforms for Dapps that are currently present on the market, or have on-going development do not have 10 active Dapps that have open market and buyers/sellers, which makes the platform attractive for users, including Tezos, Zilliqa, Cardano, Polkadot, Solana, Hive, Steem and similar
I am not following all of them but I have some small stake in Polkadot and quite big one in Cardano so I'll give my opinion just on that two.
Polkadot is quite new and is just now breaking on the scene and I am expecting much more dApps soon. There is quite a lot of developers working on them so hopefully some of them will be useful.
Cardano still does not have smart-contract capabilities. They should be coming very soon. It is quite difficult to make dApps without smart contracts wouldn't you agree? Programing language used for smart contracts on Cardano is called Plutus and based on Haskell. Did not try it yet but it should be easier to use than Solidity and should be much safer in exploitation. Just the way it compiles code does not allow for some tactics that are used to exploit Solidity based smart contracts.