title: MVVM framework AND Prism 4?
body: <p>I just read this <a href="https://stackoverflow.com/questions/1409553/what-framework-for-mvvm-should-i-use">question</a>. It has some nice answers, but they are over 1-year-old, and a lot have changed in this space over the last year. Some of the most popular frameworks have come out in a new mayor release such as Prism and MVVM Light Toolkit.</p>
  
  <p>My question is somehow the same, but with one twist, I'm already using Prism 4.0 because of the region and module features. </p>
  
  <p>Prism 4.0 embraces MVVM, but I feel there are some things which are "not lightweight", for instance interaction requests.
  So I'm thinking would it better to use another MVVM framework either as a substitute or a supplement for Prism 4.0?</p>