Are you kidding? There are plenty of devs that build bootstrap front ends - if this makes life easier for them and saves time / effort, it's an easy decision to

Are you kidding? There are plenty of devs that build bootstrap front ends - if this makes life easier for them and saves time / effort, it's an easy decision to purchase this. There are other front end frameworks that with IDE's that people pay for too such as vaadin. You're probably not in the target audience for this.