[Users] Recommended Development Setup

[Jakob Miksch]

Dear list,

I am setting up my development environment. I already tried Ubuntu 16.04 
and Windows 10 with Ext 6.2.0 (GPL) and Sencha CMD 6.5 . But I have 
various issues.

What is your recommended setup, which OS, which Ext JS version and which 
Sencha CMD version do you recommend?

Thanks and kind regards,
Jakob