I use a Telegram bot.. I create a channel for each RSS feed (or a bunch of related feeds) and then add the bot to it and use some /commands, and the bot will send posts to it. I can invite other people to the channel too, and Telegram even lets you add a little chat to discuss each submission separately
The bot is @rss2tg_bot, if you don't want channels you can just begin a private chat with it and send a rss url. Or add it to a group and then it sends new posts to the group.
Yeah, I mean if you wanted, you can include reddit (and hacker news) in your RSS feed, so no need for replacement. That said, the entire point of RSS is to curate your own experience so just linking it to reddit (or hackernews) sorta defeats the purpose. I guess its nice to have both in one place.
As for Facebook, I haven't used it since 2008 when it became clear it was a cruddy company led by a misanthrope so I can't speak to that.
