Since someone closed the original Quicken for Linux discussion it is time to ask again. Microsoft has doubled down on killing off Windows 10. All of these 240 million PCs will move to Linux.
If Quicken developers had used a decent C++ Cross Platform library like CopperSpice, wxWidgets, LVGL, even Elements, etc. spinning up on a YABU (Yet Another uBUntu) Linux would be nothing. FlatHub allows FlatPaks to be installed on basically any Linux desktop. Or you could stick with the much older AppImage packaging. I would not recommend Qt given its focus on QML turning it into a non-viable platform for anything.
So, when are you going to ship a Linux version?