Earlier quoted context omitted.
For this(and other) reason, the Asus Tinker Board looks like the superior choice, for very little more money than the Pi3: https://www.asus.com/uk/Single-Board-Computer/Tinker-Board/
ROCK64! http://wiki.pine64.org/index.php/ROCK64_Main_Page 4 gigabytes of LPDDR3. USB 3. GbE. eMMC. Onboard SPI flash. Unfortunately Mali GPU, but lima is actively developed now…
The biggest downside for me is Rock64 doesn't have an OS with the pedigree of Raspbian. I'm running the 'ayufan' minimal ubuntu xenial, and it seems solid. but when I've played around with a monitor in the full xenial build I've seen some crashes and lockups.