Pretty shocked to see this with how ubiquitous they've seemed these last few years. Of all the recent kitchen gadgets this is one of the few that felt genuinely useful to me.
I guess everyone who wanted one got one and doesn't need another. That or they realized food in it always turns out just a little overcooked and soggy.
Really depends what you use it for. Being able to make a good beef chili on a weeknight is fantastic, but people certainly try to use them for things that aren't meant for pressure cooking.
Indian food -- so easy to make something like Rajma and Dal in there.
I use mine twice a week just to cook chickpeas to make hummus from... Then the rest of the usage is always something to do with pressure cooking dried beans. Dried beans at ethnic grocers are so insanely cheap as well. I am definitely not a fan of making too many meals in there beyond certain stews.