Re-imported base SCEs after ~2 weeks, lots of updates, thankfully successful re-boot, should get more stable now. Less graphic support for my old chip compared to Jessie, to be expected, will live with it or revert to Jessie. Tried to compile Intel driver using build-essential but ./configure wouldn't complete, indicated no valid compiler. I suspect this is an old hardware issue losing support, similar to now fixed gcc in TC7, but you may want to check on newer hardware to confirm build-essential is functional. i don't have another dCore-stretch install for testing.
Tried xorg-vesa with poor outcome, will stick with xorg-intel. However, trying to startx with vesa driver from xorg-vesa resulted in a fail with missing liblz4-1 message. Once loaded then startx worked. Just wanted to report, not sure if Debian will eventually fix this or whether it should be added as a dependency. Thanks.