What do they call a Whopper?
No to drivechains. Yes to liquid now & maybe fedimints in future.
A combo that works now: Bitcoin mainchain (Sparrow/Coldcard) <=> Liquid (SideSwap)
Is there a simple explanation for why this is so?
Agreed. Kill Bill is the only one that quickly comes to mind for me
How do you feel about the 0.4% fee rate?
Have you looked at SideSwap? They do not currently have lightning integration, but, if that's possible, they may be well positioned to achieve it.
Of all the problems you listed, the fact that merchants don't use it seems to be the most important, and that can be addressed. Let's get more merchants using it!
And it's not just merchants but also peer-to-peer exchange: not enough people use it. So let's start using it.
nostr:npub12z5nym0qkxhdrvmyhup2llzp98lryr38gw8ywxktkps9eqdts7asjj9k9c Would you be interested in accepting liquid-BTC payments?
Yes, totally agree with the peer to peer use case also. Amounts not so large that need full security of on chain (avoiding potentially high fees and confirmation times), but larger than small lightning amounts (amounts that may require more lightning channel liquidity management).
I have very much enjoyed using the SideSwap app. Problem is, I have yet to see a merchant that accepts liquid bitcoin. Peg ins & peg outs are 0.1%, which imo is not too much for occasional on chain transactions. Minimum on chain payment (peg out) amount is currently 100,000 sats, but with current on chain fees, probably best to use lightning if possible for those smaller amounts anyway. Blinded transaction amounts on the liquid blockchain are nice too!
For about how long do these engines provide power? I'd like to calculate about how much energy is used. Thank you.

