I was expecting the two planets on the same orbit to crash but they weren’t consistent in their speed due to the influence of other planets. They would get pretty close together and then spread to nearly halfway around the sun.
I went back and checked maybe five minutes ago, and the years and points had barely budged, as if the thing stopped right after I’d last looked at it, which was quite a while ago. Now it seems to be fine, it’s over a million points, and not quite 90 years.