no because a lack of consistent controllable temperatures will totally doom some recipes, I mean maybe if society finishes collapsing and we're eating bugs or whatever...but I still feel like we are gonna want them to have nice even browning and a bit of that crispy crunch

No

Greeks lighted the Olympic Fire with a mirror in old times, so it's not exactly a new thing! ;-)

With stoves you can heat things up in a more controlled way. It's as hot as you want it when you want it. But besides that, way before the outside temperature ever gets as hot as stoves can get, nearly all life on Earth will be extinct, including humans...so yes, stoves will become irrelevant in that sense. =p