I originally was going to build a layout with two separate main lines, one of them 2-rail scale, and one three rail, but it became obvious to me once I decided to convert my small motive power roster to deadrail that I should have one standard for wheelsets on the layout.
I can build my own turnouts, but I don’t need the extra challenge of building a turnout to smoothly run both scale and hirail wheels, so it has to be one or the other.
Going to all scale wheels is harder and more expensive for me than converting everything to hirail wheels, and I don’t find hirail wheels to be that off putting in the big scheme of things—to be certain they aren’t as big a deal to me as the other two big bugaboos of traditional o scale, which are swinging pilots and lobster claw couplers…
Jeff C