Unfortunately yes a lot of folks are gone either through death, leaving on their own, or being shown the door. The good news is those that left on their own or otherwise are around. I usually see them at York or travels on other forums. Contrary to some folks beliefs, you can belong and participate on other forums.
All true, Marty. From my perspective, the vast majority of the best forum contributors are no longer here due to death, illness, or changing hobby interests. I think the OGR forum should be commended for providing us an "in memoriam" section to remember those great contributors that have passed away (https://ogrforum.ogaugerr.com/forum/in-memoriam). As for those that were "shown the door", fortunately, posters that have wigged out are a very small subset of the more substantive participants that are no longer here.