On CLN, you can easily batch open channels with the multifundchannel command; every modern CLN has this command.
fwiw batch opens fee savings are a function of how many inputs + change addresses are eliminated/reduced; it’s possible that a batch open doesn’t save as much as you were hoping due to a large number of inputs.
Involving others in the open has negligible fee savings, since everyone still needs at least one input + one output. I wouldn’t count collaborative opens as a great fee savings technique.
reply