My compressor has a 10-year warranty (as does the one from the refrigerator), but it usually doesn’t break down; rather, it’s the control electronics – just like with the gas heating system ;). However, the latter has a few more wear parts...
I have read about design lifetimes between 20-30 years. That would be enough for me, since ultimately it is only the device that gets replaced, and it didn’t cost 6,000 euros.
By the way, I like to switch electricity providers annually – why wouldn’t you do that? It’s that simple...
I didn’t want to be dependent on two utilities, because I need electricity anyway. With the heat pump and possibly with storage in the future, you can become more independent than with gas – and you can see from the example of Ukraine how dependent a country can be on gas and its supplier.