I didn’t have the impression that so many concerts were announced and being subscribed to a feed reduces the risk of missing a date.
For example, I was going to share here a date in Brussels for Autechre, if the thread is general, an Italian, a Polish or a French person can decide to go there, a separate thread on a country or a specific concert is less effective, I would easily share an event there although I certainly wouldn’t make a thread on purpose, it’s only my opinion obviously.
If you find the thread unnecessary I can have it removed.