Protonmail fan and user here. Guys, honestly there are better ways to respond to customers and potential customers, without the patronizing tone. That can't possibly help.
have some clean JavaScript instead of the old school jQuery?
In our particular case the JS code is quite a mess, which of course could be fixed without getting rid of jQuery, but I really want to use all the features of Angular.js
No, it is just that when the application grows too much, it is interesting to have the JS organized in a more standardized way, the MVC feature and two-way binding is very attractive to me.
I work at an Brazilian mobile ad network running on Amazon AWS and our traffic is really intense. There are 13 developers in total in the team and none of them are DevOPS, which make me conclude that most often than not, you don't need a person specialized into server maintenance and infrastructure.
Like some people said before, Heroku is great for prototyping but just not a good deal in the long run. Too expensive, way to risky/unreliable for serious stuff