At some point the cost of replacing elements is going to exceed the cost of a new oven. You could stock up on elements if you can find any.
I don’t think I’ve ever had an element break on me, though, even on decades-old ovens. You might want to check the power to the oven and element just to make sure you’re not over-volting it or something.
Definitely possible. The first one lasted nearly 30 years (until 2020), the second lasted less than a year and was still under warranty, and the third just broke a few weeks ago. My repair guy seems to think the replacement part he’s been able to get is just lower quality than the original.