I am not sure where to post this, but the good people at RootsMagic need to know this. I am an FTM user who is going to migrate to RM7 when direct import is available. On the FTM forum, the question was asked/stated by an FTM user that it would be a "bad idea" from the new owner of FTM to allow this sort of import as it would make migration to RM7 easier. The reply was as follows:
" ... So we can end the speculation here. The first updated editions of FTM published by Software MacKiev are now officially available (since March 1st) and ... it will NOT be possible for RM to import files directly from them. "
The reason is as follows - MacKiev appear to have changed the database structure/layout of the FTM file - and they done this as part of releasing the first patch for the product. The patch was to fix as many bugs as possible since they acquired the software from Ancestry. They obviously took the chance to change the database as well.
According to the company, the patch is optional - so people like myself will not apply it - and hope to migrate natively later this year. However, I suspect that the vast majority of FTM users will simply apply the patch via the normal download method - in which case there will be almost nobody who will be able to use your native migration method by the time you have written it as the patch will probably not advise the user of any of this information.
Thus, it appears to me that you may as well not waste time writing the code for the 1% of users who could migrate from the old code base. Alternatively, you and MacKiev could enter some meaningful discussions whereby you could both read each other's database. As an example, anyone can read the MS proprietary WORD DOC format. Wouldn't it be nice if all family tree software could do the same with their databases?
On a high note, MacKiev have promised to make their GEDCOM output 5.5.1 compliant. So that hopefully will make it easier for you in future anyway.
I am interested in RM's thoughts on this problem.