[rvnx]

Somehow I think this is still possible. The engineers behind WhatsApp seem to be very talented, and they may be able to convince Zuck that an open client would increase trust in Meta's brands, and increase usage (which can then be used to promote other Meta's products).

If they keep the server-side closed, it's totally fair I think.

[palata]

Or open source alternatives will pick up their work, and the WhatsApp engineers will probably be happy about it.