This should probably be in the "quat" section, but this is my favorite lime. My wife makes a excellent key lime pie out of these & they are almost the same as a key lime in size & taste. The big difference is they are quite cold hardy. When we had that 16 F night in2018 my Eustis tree sailed through it & never lost a twig.
Perhaps because if it is that much like a lime, the lime has already filled that niche in the market. Or maybe it would be too expensive to introduce and market the fruit to the general public for the return on the investment... after all limes are pretty cheap.