They're all terrible. Here's some terrible from Monero:

  [wallet 432JYE]: help 
  ...
  fee Print information about fee and current transaction backlog
  ...
  set Available options: seed language - set wallet seed language; always-confirm-transfers <1|0> - whether to confirm unsplit txes; print-ring-members <1|0> - whether to print detailed information about ring members during confirmation; store-tx-info <1|0> - whether to store outgoing tx info (destination address, payment ID, tx secret key) for future reference; default-ring-size <n> - set default ring size (default is 5); auto-refresh <1|0> - whether to automatically sync new blocks from the daemon; refresh-type <full|optimize-coinbase|no-coinbase|default> - set wallet refresh behaviour; priority [0|1|2|3|4] - default/unimportant/normal/elevated/priority fee; confirm-missing-payment-id <1|0>; ask-password <1|0>; unit <monero|millinero|micronero|nanonero|piconero> - set default monero (sub-)unit; min-outputs-count [n] - try to keep at least that many outputs of value at least min-outputs-value; min-outputs-value [n] - try to keep at least min-outputs-count outputs of at least that value; merge-destinations <1|0> - whether to merge multiple payments to the same destination address; confirm-backlog <1|0> - whether to warn if there is transaction backlog; refresh-from-block-height [n] - set height before which to ignore blocks
  ...
  [wallet 432JYE]: fee
  Current fee is 0.000222060000 monero per kB
  2 block (4 minutes) backlog at priority 1
  1 block (2 minutes) backlog at priority 2 (current)
  1 block (2 minutes) backlog at priority 3
  No backlog at priority 4
  [wallet 432JYE]: set priority 3
  Wallet password: ***************************************

Me and my grandma: Priority? WTF is priority? Why does "priority" set the fee? It's all so bloody terrible. Friends messaging me to buy some IOTA. Guess what? It's very complicated to buy IOTA.