For sure, liquity is pretty great. As to why it's underutilized, it's similar to what mouse is saying. Particularly in the early days, LUSD commonly ranged from 0.97 to 1.03. It was always fine in the end, but it requires that one extra step of making sure you're repaying at a beneficial time (or buying troves at a beneficial time). And of course, any add'l step makes a protocol slightly less tasty. I think the range is much smaller these days with added liquidity.