Running a service aggregating feeds (something like Google Reader was, or a hosted tintinyrss) this can become complicated with the different link taxes (ancillary copyright for press publishers) being introduced in different countries.

From a technical perspective I would argue that RSS feeds are offered for that purpose, lawyers might still see it as an infringement of rights granted by those laws ...

Poor choice of words on my end: "potential regulations that might get imposed"* as to what sort of data can an rss reader display, how it can be linked and all that mumbo jumbo ( similar scenario to this[0] or when google news got shut down in Spain [1] ).

[0] https://arstechnica.com/gadgets/2018/02/internet-rages-after...

[1] https://www.theguardian.com/media-network/2014/dec/12/google...