This here is the best advise. I had considered eventually mounting the chart plotter in a pod, but have decided against that, to allow easy, tool-less removal of the unit if I need to rely on the compass. In my opinion and experience, the primary compass is just too fundamental to navigation to be considered as little more than an archaic decoration.
I can't see it. The only time I have ever truly depended on a pedestal compass was sailing offshore with no references on the horizon. (And, by the way, I found this very difficult to do for hours at a time.) In that case an error of, say, 10 degrees, doesn't really matter, because the point is merely to hold a constant course. OK, if a really strong magnet was nearby, the compass couldn't move, but that's a stretch.
When there
are landmarks to be seen on the horizon, a handheld "hockey puck" is all that's needed. I use mine all the time. Usually, I want to know where something (island, reef, headland, buoy, etc.) actually is. I poke at the touchscreen chartplotter, read off the magnetic bearing, take one step to the side and squint through the puck. Presto! Every once in a while, I will haul out my WM compass binoculars for small/distant objects. The Ritchie would be useless for any of this.
I still think that, for inshore sailing, the pedestal compass is merely a sentimental tribute to days gone by. Massive electrical failure is, of course, a real possibility. To find my way home, I have two old Garmin handhelds in the nav desk, a bag of Costco batteries, and a chart book.