I just upgraded from an X3 to a HD500X today and on the file format front I find it a bit depressing. People are saying they are not like for like so it's impossible to convert. I disagree. There must be an upgrade path for each device & amp, (ie for this this amp we recommend now using..... ). If the resolution for each nob is greater then use %, dry wet/ms settings for a delay are universal. Even if It was an approximation but had the same fx types it would be a great help instead of starting from scratch.
I'm also doubly disappointed pod farm 2 is incompatible. I bought that SW specifically for the excellent workflow of being able to transfer tones from VST to hardware, for me this was the USP with Line6, I don't know of any other manufacturer that can do this. Please Line6 make a plugin version of the HD series tones.
It's a shame the tone files aren't xml, it would be easier for the community to roll a converter although I know jZab is doing a great job here. http://www.jzab.de/content/pod-hd
Sorry had to get that off my chest, other than that the looper and sound quality is amazing.