For me, it's a bidet toilet seat. I bought one that didn't really fit as well as I hoped, so now I am shopping for a v2 based on experience. I don't want to live without one going forward. That's for sure.
A Bluetooth audio DAC/amp. Connects to my phone. And I can use whatever wired set of earphones I want. Light gardening: earbuds. In public transport: over/on ears. And if the DAC dies, I get to keep my earphones and just replace the DAC.