Even users of shared UTXO constructs I think will need inbound liquidity. If you go from shared UTXO to shared UTXO in a networked way you will go via LN or something like it. So unless you are dealing with someone in the same UTXO, you use LN, which means receiving uses inbound.

Name & Symbol: Lnfi Network ($LN)
Address: 0x6d2ebdf6d551d8408e7d896e9a1ec6f84806e193