Spillman: yes, huge for noncustodial micropayouts

DLC: yes, huge for privacy

These two make up my short list. I haven't even started on this work yet. Wanna help?

KVAC useful for all things ecash. KVAC turns your ecash wallet from a bag of coins to a single coin. Huge for privacy, doesn't really intersect with mining AFAICT.

I have never heard of STWO but if you are talking about ZK proofs then they are extremely useful for verification of ecash mints and mining pool operations. We'll need this to scale verifiable mining.

HTLCs are interesting but I think they are not really private (might be wrong about that tho). They can be used to create virtual lightning channels which are very exciting for lightning liquidity and JIT LN routing.

Don't tell the hardliners but this is monetary inflation by another name. 🤫 Extremely useful tool in the economic toolbox. Probably necessary to scale lightning. It's gonna be a tough pill to swallow when all those lightning maxis realize they laid the foundation for an inflationary monetary network (lol who are we kidding they will never own up to it). I haven't found an application for mining payouts but I haven't looked that hard b/c DLCs seem to have better privacy properties.

Honestly, I think we have over invested in lightning and are due for a course correction. The LN protocol as a whole just seems too complicated and prone to centralization. Regardless, this would be super interesting work to pursue but it doesn't top my list.