New list link?
http://tascam.com/content/downloads/products/867/dr-70d_tested_media_list_20151006.pdf
"The performance of the media may be degraded significantly if used repeatedly"
HUH? Has any other recorder or SD device ever carried such a disclaimer?
I never saw this before elsewhere, so I just took a look through a bunch of the other Tascam recorders. Check out the media lists for the
DR-22WL,
DR-44WL and
DR-680 MKII.
The DR-680 MKII has one SanDisk listed with pretty much the same designation you quote from the DR-70D list:
※1
After repeated use, the write performance of this card deteriorates. It is suggested that
periodically audio files get transferred to a computer and the unit's ERASE FORMAT function is
used prior to further recording use.
EDIT: It appears that Tascam Europe has a
different media list for the DR-680 than the US site, with 5 additional cards not on the USA list, and 4 out of those 5 cards having the above designation.
The DR-22WL has one SanDisk designated as "C. Pass" which appears to mean the same thing as *1 for the 680D and 70D:
C.Pass = Conditional pass. Use the card after the format.
The DR-44WL has quite a few cards designated "C. Pass", most of them SanDisk.
So that qualification is not unique to the 70D, but maybe unique to Tascam in general.
One other thing interesting about the DR-22WL list is the 13 Lexar cards tested, all listed as "Fail".
As to why there are no recommended PNY cards or other brands, it looks like the media lists for newer Tascam recorders only have SanDisk, Panasonic, and Lexar. Sometimes only two of those, maybe based on all the Lexar failures with 22-WL. So my guess is that they just aren't bothering with other brands.
BTW - what list was the PNY card ever on? I can't find any PNY cards on any Tascam list, on either the USA or EU sites. I understand that the wrong media list for the 70D was posted on the Europe site, but the wrong list that was there was supposedly for the 100MKII.