As my Pixel 2 starts to rapidly age (especially the battery), I'm considering moving to a OnePlus device rather than another Pixel. The specs all look good on paper, but the one thing I can't nail down is the OS. What's OxygenOS like? How often/quickly do updates come over, how far do the stock apps differ from Google's, etc. ? I've used something as intrusive as TouchWiz and as light as Moto's. How does OxygenOS compare?