I seen a lot of people say it's as easy as sending all utxo to a single newly created receive addr on the same wallet with 1sat fee.

Is that right? Wouldn't that never ever confirm at 1sat or am I missing something? 

 At these fee rates, it would probably fall out of most mempools at 1sat/vbyte.  

 I don't think they ever get lost. I know a mempool with a 5GB capacity. Receipts are kept.

It doesn't mean that they'll ever be added to a block though.

A 1.1 sat/vB is a better.