In your opinion, which FOSS software is by many considered "old" or "obsolete", but are in fact, in your opinion, in many ways better than the newer alternatives?

I'll start:

• RSS and blogs, news vs. social media
• XMPP vs. WhatsApp/FB messenger/Snapchat
• IRC vs. Matrix, Teams, Discord etc.
• Forums vs. Social media, Reddit, Lemmy(?)