I think the Lionel product is useful, as was said, if you have difficulty putting locos and rolling stock on the track.
However, I think the reason there is no equivalent to the N and HO gauge re-railer track sections, is that there is no need. When I had N, such a section was useful and I had one on every loop, because occasionally that would happen on any loop - just seemed to be random, and the rerailer section "took care of it automatically" soon after it happened.
But I can't recall the last time I had an O-Gauge loco or train car, that was put on the track correctly, ever de-rail itself.
