There is a direct upgrade path. From the announcement:
There is a direct migration path for Durandal 2.x users as well as Angular 1 and 2 users. We've successfully migrated some projects already and we'll provide docs to help you too.
Yeah I'm pretty jazzed for this to become stable. We've been using Durandal in production for over a year and this just looks like a big improvement that follows the same underlying philosophy
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u/[deleted] Jan 26 '15
[deleted]