Without getting into the weeds, the value I see anyone getting from an OP-1 (of any generation) is still the all-in-one musical notepad angle, and I just don't see that being anywhere above the price of an iPad (which trounces the OP-1 in terms of music features if you install AUM and the Audiokit Pro synths - no DAWs involved).
I/O story is a bit sad (one usb-c), but for most purposes it can be worked around. ipad, a few midi controllers, pair of monitors, 5€/month Logic Pro, FabFilter maybe, some intrument AUv3s — I am scared to imagine price of an equal setup, say, 15 years ago.
The high price is one of the most important reasons for their success.