Piwik & Symfony 3

AFAIK piwik is using Symfony 2. We are going to make some plugins for piwik and app that will use piwik, which should work for many years but with very limited access for future updates etc. And so we are wondering, what php framework we will be using for it and the most logical for me would be to use Symfony as well. And my question is, if / when will Piwik use Symfony 3?

Piwik is only using some special parts of symfony like console.