The app warns you to keep it open while scanning for on chain deposits which can make transferring on chain sats in a bit stressful with higher fees. Is this just a UI byproduct from the unified addresses? Are the on chain addresses just derived from the mnemonic so they're always valid or is it a swap address that could expire? 

 I would not recommend hitting remove federation without moving funds out of current one. I removed a fedi with no funds to try adding another and the wallet didn't remember my previous fedi. Looks like one fedi at a time. I don't know if the keys generated in mutiny recover esats from a federation.  

 All ecash is backed up across all federations. However, we mostly recommend against it for the reason described above. 

If you forgot the federation you were in, if they delisted, if they shut down, etc.  

 Thx! So better to withdrew funds before the switch of Federations. 

 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 

 Haha so im no tech savvy and to be honest my setup is so simple. 
Amethyst = client 
Minibits wallet = wallet 
Nostr.build = image/video hosting 
Thats it. Hahaha  

 Perhaps I'm putting too much pressure on myself to learn too many things at the same time.  
Your approach seems much more palatable.