Not possible. Stretch need a more recent kernel and on this recent kernel, there is no NAND support.
If you want (much) worse support, yes.
I recommend you to wait for release - few days ahead - or do some testing with nightlies too see what you can expect:
https://dl.armbian.com/cubietruck/Debian_stretch_next_desktop_nightly.7z
https://dl.armbian.com/cubietruck/Debian_stretch_next_nightly.7z
In any case, use some modern SD card.