Specifically, does HN/Y Combinator plan to allow contributors from the EU to request their contributed content to be deleted after May 25?
Note that they currently do not allow bulk deletes of one contributor's messages, "as that would wreck havoc in the discussion threads".
Basically you can ask nicely to delete some few posts, but if you want to delete all of your contributions you will get a no. This is at odds with the GDPR.