My iPod with FireWire is still working after twenty years. I am syncing it with a iBook G3 which only needed a new battery a few years ago.

But we already paid >28ct/kWh before the war. And with PV storage, you are nearly immune to price hikes.

But 10ct/kWh is already really cheap compared to getting energy from the grid. Even 28ct/kWh is quite a competitive price.