What were you using? RC1 came with a go live licence and should not have been having constantly breaking changes. From what you&#x27;re saying it sounds like you were hooking up to the MyGet streams for the RC2 work which has never been announced as production ready and the dev team have repeatedly said is only for those who really want to live on the bleeding edge.<p>When RC2 is released in the near future the upgrade path from RC1 currently isn&#x27;t that bad as a one off process. That they produced something good enough that the rest of the .Net team wanted to make use of it as well is a good thing and is going to be of benefit to .Net devs in general.<p>As for upgrades looking back through things like Rails early release notes there were plenty of &quot;you&#x27;ll need to do these things to upgrade&quot; notices.