This makes sense, but I wish there was a generally accepted way to share geospatial data and POI data against OSM IDs. e.g. I want to be able to add overlays for noise level, etc. and I find the whole thing too fragmented. The OSM way seems to be the right way, but no one seems to do it. You just maintain your own DB with an optional OSM POI entity identifier etc.

I suppose if you want something badly enough you have to do it yourself, but it's not that the thing doesn't exist though it doesn't seem to. It's that I want others to want it too :)

Can you simply write overlays as GOL files and load them from non-OSM URLs? Assuming you use the appropriate coordinate grid you won’t need POIs to layer the relevant data, and if you choose to annotate OSM’s POIs further, you can save those annotations as a personal GOL that you optionally share with others, and that also enables cross-referencing derivations if you use (unverified: trust isn’t the point, uniqueness is) signing key fingerprint as the GOL author GUID.