Lazarus on ubuntu and windows is usable, i'm still struggling with macOS and there is legends and lore of ios/android support. It even seems to support qt, but I have not went there yet.

Something else to mention about lazarus is you can hot compile the ide too add in components, fix issues; While using lazarus. It takes a couple of minutes to recompile and there a fail safe cli method to restore. But rather amazing if you wonder how long it takes to compile visual studio professional or qt.

http://wiki.freepascal.org/IDE_Window:_Configure_Build_Lazar...