For the same money it would be possible to buy the full version of a DAW of your choice, Kontakt, Arturia V-Collection and a PC to run them all on. I'm sure the OP-1 is fun, but I doubt it's £2,000 worth of fun.
It's true that if you just compare the costs, it might be cheaper to go the software route. But I mainly make music to go away from the computer, as I spend a lot of my days programming on one already. And the ability of pulling me away from the computer you can't put a price on :)
Plus, fiddling with real knobs that affect the sound in real-time, having a keyboard with a heavy feel, being able to turn on the hardware and instantly be able to use it (no fucking around with forced updates) and the ability to mod your own hardware with just a solder-iron is just like really really fun.
If I had $2000 to throw around, I'd buy a Syntakt + Digitone/Digitakt instead and get a setup that could do whatever I want + more.
Yeah, I agree with that, which I thought my previous comment made clear, maybe I wasn't clear enough.
But yes, on an objective scale, the OP-1 is not competitive.