I've read that #WhatsApp wants to interoperate with other #messenger applications, to align with #DigitalMarketsAct. My problem with their #UX approach is that it's only planned as a third-party tab, with no promise of a setting that would place all the chats on the single page.
I realize they have security reservations, but I smell a dark pattern here: only do I message my people on WhatsApp from Matrix, they'd have to change tabs, making a chat with me stick like a sore thumb - or not stick at all.
Hot bottom-line: hiding behind a tab is no different than cutting off #interoperability altogether. Multi-messenger chats should become a first-party feature in synchronous software, to comply with #DMA. Targeted apps that don't care about such regulation have no future.
