Show HN is pretty specific and has its own weird rules (linked in the show tab up top). It’s mostly for things people have made that can be tried out. You should definitely post interesting things you’ve found, if they don’t fit Show HN, you can just skip the Show HN prefix and avoid the bureaucracy.
Thanks, that's a big help! I think actually the Conway's Life community does quite regularly have "interesting things" that could fit the Show HN model.
The example I'm thinking most about is the fixed-cost 15-glider construction for absolutely anything that's glider-constructible at all --
for which we do have some eminently runnable code that showcases the entire process of 15-glider construction from beginning to end, with subtitles ...
... running inside Golly, but that's a free download, and the Lua script version doesn't need any extra Python installation or configuration or anything.
So if I don't get too much "Nah don't do that" feedback here, I might try putting up a Show HN post for the new super-optimized RCT15 project, once the last pieces of that get completed.