Oven repairman has come, taken it apart, and advised that it'll cost half what a new one would cost to repair. He also advised that, with it being 15 years old, other parts are likely to break soon if we keep using it, and new parts aren't made any more. We've decided to not repair and just keep using it as-is for now - it still works well enough for most things.

Dishwasher repair is still in progress (waiting for the next replacement part to arrive...)

So much broken.