Pre-kids I used to take what my other half would describe as ‘wires’ on holiday to muck around with when I had a spare 5 mins (plane rides etc) - basically jotting down ideas (fun fact - this tune was one started as a holiday sketch from the early 2010s - which I finally managed to work up properly for the album last year
I can see my younger self using this sort of device for that type of thing. Now I have kids there is no such thing as a spare 5 mins. I’d probably pay around £150 for a second hand one in a few years time, if it ever drops that low.