Those LinkedIn posts indeed show a more negative side of the issue. Still, I have high hopes for the future of Qt, and if they ever go full-on commercial, there is an agreement with KDE regarding that situation (but I'm too lazy to find it right now).
Yes, there's a solid contract in place to ensure Qt's open source availability that's worth a lot!
I've been working with Qt for going on 20 years, and there's been many episode to its story indeed. There will be more; it remains very capable and useful technology.
