> e2ee handwaving but there will never be proof unless they open-source it.

This is a good point, and the Wavelength team is well aware of this.

> but suspiciously not matrix.org

I will admit I’d not heard of Matrix until your mention of it here. So I spent a few minutes downloading it, signing up, etc. It’s obviously competitive with Wavelength to some extent, but the first-class threading concept isn’t there. It seems more like a modern IRC or Slack alternative. Glad to be made aware of it though — thanks.