Some more arguments for a local-based treading model over a content-based one:

1. The format: `or(@DATE)both makes sense: # as prefix is for a hashtag like we allredy got with the(#twthash)` and @ as prefix denotes that this is mention of a specific post in a feed, and not just the feed in general. Using either can make implementation easier, since most clients already got this kind of filtering.

2. Having something like `will also make mentions via [webmetions for twtxt](https://darch.dk/mentions-twtxt) easier to implement, since there is no need for looking up the#twthash`. This will also make it possible to make 3th part twt-mentions services.

3. Supporting twt/webmentions will also increase discoverability as a way to know about both replies and feed mentions from feeds that you don't follow.