The immutability of it is amazing! It's so easy to use in your projects because you don't have to worry about mutable objects that can mess up with future changes or refactors. Also I like how quickly they are responding when there was an issue (and fixed!) within minutes. Nothing really. They're very responsive but also not over-the top crazy expensive either. But still cheap enough where anyone could afford them. You should try this out if you want something immutable. Especially in frontend development we need more robust solutions than just using js arrays.