Anybody who worked with Sencha/ExtJS could attest to it. A few years back they were the goto mobile framework and it seems to have lost steam. The best way wo

Anybody who worked with Sencha/ExtJS could attest to it. A few years back they were the goto mobile framework and it seems to have lost steam. The best way would be to monitor current trends and learn the design principles and frameworks that they're based off of (right now, MV* frameworks like Angular, what Ionic is using.)