Well the silence is deafening on all forums,....so I guess there ain't much change at all in the S970 MFD...

If I remember correctly, both my S950 and S970 came with the same number of records; around 123 or so.

The MFD wasn't even a consideration when I bought a PSR keyboard.

First thing I do is delete all factory MFD entries... I only use it for custom made MP3 Backing tracks..... All style songs via Registrations....

First thing I do is delete all factory MFD entries... I only use it for custom made MP3 Backing tracks on short 1hr jobs only, everything else I use my Laptop, ..... All style songs done via Registrations, ....

As stated above, it only comes with a few MFD entries. The complete list can be downloaded for free at Yamaha website.
I personally don't use the MFD, except when I first get it to scroll through, see if it "knows" any songs I might use, audition them and either save them to Registrations or forget them.
Haven't found much I use.