Well unfortunately you could never have a giant group chat in Delta currently due to the lack of moderation features. XMPP is better for that. I completely agree though that Delta (and Arcane Chat especially shoutout ADB great guy) has many of the privacy improvements that something like Signal ought to. It's stupendous for handing limited connectivity, the bots and apps are awesome (better than Matrix by far) and unlike the more commonly promoted alternatives that are dependent on US state dept funding (Signal and Matrix), XMPP and Delta Chat use W3C internet standards

Although they are trying to get picked up by the EU who are ignoring them 😅 not much better than state dept. Delta is just so interestingg