Aren't these threads the very definition of "TAGS"?

If you go to the Ignition Gateway → Status → Threads, it gives you a list of which threads are currently running like a process list. It categorizes them all, and provides up top a graph of how much processing is being used by each category. There is a “Tags” category on the graph, but things like tag-provider-default and tag-provider-MQTT Engine are not in that category. They’re left “Unclassified”.

I feel like a tag provider would be the very definition of the sort of thing you would classify as “Tags”.

Yep, there’s plenty of missed opportunities for better thread classification. I’ll log this one.