I didn’t know push-notifications use XMPP. In the light of new (to me) knowledge, I’d like to rephrase my question:

Are XMPP clients (e.g Gajim) relevant today? If I were to use one, what would I use it for?

Genuinely clueless, is XMPP relevant anymore? I consider myself reasonably technical, and when it comes to chat, here’s what comes to mind:

1. IRC
2. Slack / Zulip / Mattermost
3. Discord
4. Matrix / Element

If I was to use Gajim, who would I talk to? e.g any communities or projects