Most houses still have ovens. Microwaves are pretty widespread as well. But, their main job is to warm up food which was cooked in an oven (either locally or at a centralized oven in a food manufacturing factory). Microwave and ovens are mostly complementary tools.

Although, the analogy seems sort of useless, in that the food preparation ecosystem is really not any less complex than the program creation ecosystem, so it doesn’t offer any simplification.

When I had neither I found it convenient to buy a small oven - the size of a microwave. It performs both functions. It doesn't reheat things as quickly as a microwave.

I've lived without a microwave for a long time and it's only a little bit inconvenient because things take longer to reheat.