NOBecause they are not coins.
The distributed OPEN proof of work chains are the coins. The job of the coins is to be $MONEY.
Slow yes.
Costly fees yes.
Solid unit of value exchange with international consensus >>> the key yes.
Another word is settlement.
Sometimes called TENDER for all debts.
So coins are the
$MONEY.
Old, slow, but that's the way of money.

Generation 1.0 is COINS
Generation 2.0 is commonly thought of as ETH, but maybe not true, sense the marketed case use for Gen2 is not $MONEY but sidechain solutions aka tokenization aka ERC20.
The final factor is cost to trade tokens in volume. ETH is shaping up to be just GEN1 pretending to be the GEN2 solution. GEN2 is also "smart contract". It needs to be able to lock GEN1
$MONEY and have oracles or escrow agents features that work. (Still not yet to be seen in real world use). GEN2 provides IF > THEN solutions.
Generation 3.0 okay that's the DAG
coins networks.
Steem is the best example to see what this could be.
Vast social networks where it is FREE to tx "talk".
Fast to confirm.
And wide TPS bandwidths.
So EOS, BNB, XLM, HBAR, Libra are top GEN3.
They are not DAG.
Because they lack the 'Distributed' 'Decentralized' feature.
Yet DAG is competing with these cartel networks.
But DAG is again not a coin but a network.
They mostly can be evaluated by earnings / cost.
They can provide fast cheap markers for coins or equity.
But the markers must be settled up by end of day (or whatever risk window) with GEN1 COINS.
https://twitter.com/JWWeatherman_https://10hoursofbitcoin.com/