Ask HN: Why don't sites like Facebook offer desktop clients?

Random thought: It seems like with modern browsers, ad blocking, tracking blocking, etc, Facebook and similar are losing lots of ad revenue.

Wouldn't it make sense then to also make desktop clients and to push traffic from the browser to the desktop client. Sort of similar to Reddit's annoying push to drive mobile traffic to their app.

(Some people get all their internet from Facebook, it sort of goes back to the AOL internet portal days.)