Need a "send max/all" button for quickly doing this.

Look at my balance, create an invoice, payment denied because I dont have enough to cover fees, recreate invoice, finally send successfully, have to figure out what to do with small remaining balance, probably end up with 1-2 sats that become unspendable. Bad UX. 

 Yeah, some cashu wallets manage showing the balances and fee estimates better and have coin control. There are going to be major differences between wallet behaviors of fedimints and cashu