https://mail.kde.org/pipermail/kde-community/2020q2/006098.html?print=cGh4
Can problems occur in the development of the system?
Probably the best record of history & details would be found at https://forum.lxqt.org/t/lts-versions-of-qt-will-be-available-only-under-a-commercial-license/1097/
alas it’s off-line 
As for the new recent changes, sorry I don’t know, and for now it may just be wait & see, being all we can do.
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Ah, thanks. Is wait…
The following may interest you
https://lwn.net/Articles/817129/rss
and especially
https://www.qt.io/blog/qt-and-open-source
my source: https://discourse.bigdaddylinux.com/t/whats-happening-between-kde-and-the-qt-company/661
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