Earlier quoted context omitted.
I don't think that the proprietary office suites are needed. The alternatives are good enough for what people do, aren't they? The problem is that people don't want to change, because it takes some effort. Why would people use WhatsApp instead of Signal otherwise?
There used to be programs that would connect to multiple proprietary systems, like Pidgin. If we had this today we'd have one free-software app for WhatsApp, Signal, and Telegram (and some used in other countries, like IIRC Zangi?). However, the social and regulatory environment changed - now whoever made that app could expect to be charged with a crime.
We've been working on our next major release for a long time now to better support modern protocols. But as an unfunded Open Source project it's hard to get things done quickly when it's a "free time" only project.