The original idea to structure transaction outputs as elliptic curve points so that they would automatically benefit from transaction cut-through was put forth in a paper called Mimblewimble. Two coins tried to implement the idea, Grin and Beam (IIRC). Much later, Litecoin also adopted the idea for an extension block with different rules than the regular on-chain transactions.

The dude who coded for Grin (David Burkett, made Grin++ which was a GUI wallet, all others were cypherpunk and difficult CLI wallets) got hand picked by Charlie Lee years back to work on litecoin. Haven't heard anything in forever tho til this.