The problem Wuphf-Moments solves

Nothing is more tilting then when you see your grail Moment, with your favorite serial number, getting scooped up by someone else. A Moment you had been eyeing up for weeks, gone just like that. Which is where wuphf-moments could be a game changer!

Challenges we ran into

Parity between SDKs. FCL does not support executing a script on a specific block ID / height, while the Go SDK does. Had we known this, we would have chosen the Go SDK, for the indexer module.
LaligaGolazos does not have an easy way to correlate an NFT ID with its edition and serial number. There is an event however, which includes all these three numerical values.
Querying events from past sporks is not trivial. This is often needed in cases such as above, where some knowledge base can only be built using events.