Hi Jack,
I am glad to see you are doing fine. The way it went down with Sencha was sad indeed. Pretty much all employees got the boot once the company got sold.
Since I want to stick to serious frontend development for a while longer, Rich Waters and I started the neo.mjs project already back at the end of 2015. The goals are pretty simple: most parts of the framework and your apps (including components) live within a webworker (either dedicated or shared). The ES8+ based dev mode runs without any builds or transpilations as it is inside your browser. Max Rahder just created the first training materials for a 40h class for Accenture. The plan is to use these as the basis for a new (long overdue) learning section.
I do agree that changing the license for ExtJS back in the days was rough. We learned about this mistake for neo: all the way MIT license and it will stay like this.
In case you have time: feel free to join our Slack channel. A lot of ex-Sencha community guys and coworkers are in there.
Best regards,
Tobi