Tried to use QT for a new product based on a STM32F769 MCU some time ago. I got laughed at and waved off when asking for the budget needed to buy/licence QT stuff. To be fair, they need a business model, but the target audience seems just to be automotive or anyone who's planning to roll out something with at least a million pieces in mind.
It is also very in your face. Went to go install the SDK on windows - have to create an account, click a ton of stuff in the installer to convince it that it's okay to give me the free version, etc
It then proceeds to install 20+ gigabytes (yes) of stuff, including their ide that you can't actually uncheck.
No thanks, i'm out.
you can install it from vcpkg or conan (or https://github.com/miurahr/aqtinstall if you really want the official Qt binaries) and it'll be much less