The Qt Company Is Tomorrow Moving Qt 5.15 To Its Commercial-Only LTS Phase :
Qt 5.15 LTS going commercial-only while Qt 6.0 is in a very primitive state still has irked some users and developers already. The fact that the Qt 5.15 branch is being locked down midstream is also irritating some who have worked on fixes for regressions from earlier Qt 5.15.x point releases only now not to have a public release with those regression fixes.