Wow. I had no idea.
When we had our little permaculture front-yard food-forest many years ago, we had a Kaffir Lime tree we planted, that thrived along the driveway. I simply adore the aroma in cooking. I tried doing something with the fruits too, but it seems to only work well using the zest of the skin in cocktails and Gins ... 🙃
In here, Indonesia, Kaffir leaves more popular than the fruit. And, the stock of the fruit just a little.