With regards to importers, we (XenForo) have decided that we're not going to officially support a sonnb XenGallery importer going forward (and the same applies to any other <XF add-on> to XFMG importers that we had). We have no interest in trying to "take customers" from non-official add-ons.
However, I appreciate this is going to be problematic for some. Especially if you decided to upgrade to XF2 without realising that there was no longer a migration path available.
The next version of XenForo Media Gallery is going to include some importers. So if you're coming to us from vBulletin, IPS, Photopost etc. then
finally you will be able to just do that straight into XF2 without going via XF1 first.
But, as I mentioned, that doesn't include sonnb XenGallery.
But I have a solution!
Although we're not going to be
officially supporting a sonnb to XFMG importer, I have actually written one, and it will be released as a separate add-on. Aside from basic fixes to ensure it works, we won't be able to provide much (if any) support for it. There may also be some gaps because the importer was created and tested with a fairly old version of the sonnb XenGallery add-on that I have from years ago, and it likely doesn't take into account the additional functionality from the video upload add-on.
Regardless, I will be releasing that for free shortly after the release of XFMG 2.1.1 (no ETA yet).
In the future should
@sonnb resume his work on an XF2 version of his gallery, then I'm sure he will provide a migration path from XFMG, and he would of course be more than welcome to do that. In fact, if he does come back, we would even consider deleting the importer. The only intention here is to ensure that our existing mutual customers are not stuck in some limbo.