I do not have much experience with SharePoint 2013 when it come to development, at least not yet. I know that 2013 has both a 14 and 15 hive, which would lead me to think that you can put 2010 solutions on the 2013 environment. I also know that SharePoint 2013 is running off of the 4.5 framework which would lead me to think the DLLs will not work anymore. I have read some articles which say that there is a compatibility mode which will allow for GAC deployment of 2010 solutions. Can anyone tell me what I should watch out for when converting. As a SharePoint developer, I think it would be better to just recreate the web parts in 2012 VS and repackage.
Can running the 2010 wsp in PowerShell to deploy to 2013 cause any issues I should be aware of? Is it better to repackage and deploy? Has anyone run into anything they did not expect by loading 2010 custom solutions?