UNIGUI is by far the most productive environment I found.
I have studied Dart+Polymer,some React,have managed programmers in ,NET and Java.
Delphi itself is a very productive tool,UNIGUI just made the bridge between Delphi and EXTJS.
For those who really knows OOP,the so called separation of concerns were allways achieved by
using objects and Visual Form Inheritance,all the navigation and behaviour was done in the form ancestors.
You can have your business rules propagated to the client,so at least for me ,all these MVC environments
just made things more cumbersome.
So you have a very productive IDE,a killer framework EXTJS(even Polymer is not so feature rich)
,the most easy to read code(Object Pascal),good database acess.
Angular and React are really not for ERP development.
And I dont know any other language where You can protect your code like Delphi,obfuscation are not so good as having your DLL.
The money you pay for a tool,is nothing if compared to salaries,testing,and the risk of loosing consumers during the transition.
If you have a good system written in Delphi that needs to be ported,UNIGUI is your only option.
Intraweb is not only ugly for today,it just don´t mimic a Desktop.