Thank your for bringing into the world this beautiful tool. I paid for ST2, ST3 and SM and it brought a lot of joy into my work. I'm more into VSCode now (ST python editing experience has been lagging behind), but I keep ST close for out of project editing.
I hope one day you will release your UI toolkit. Since it's crossplateform, fast, and plug into Python, it could be a wonderful alternative to PyQT, wxWidget and the like, and we really need something in the Python world.
Good luck to ST4.