Are both CSV and nLocktime unnecessary in Eltoo? The Eltoo paper says "Notice that we could use nSequence for this purpose, but due to the interplay with OP_CSV we opted to use nLocktime". Now that Lau showed CSV not to be necessary, does that mean that there is also no reason to use nLocktime?
Anthony Towns' recent draft uses CLTV, which also uses nLocktime.