Today I more deliberately put the new laptop through various suspend/resume "trouble" scenarios, and it behaved flawlessly.

Suspending on AC power while "docked" to a USB hub with peripherals plus an external monitor via USB-C (displayport), then undocking and resuming on battery with nothing attached. And then the inverse.

All good.

I even tried out Linus's current git tree (pre linux kernel 4.21), which it also survived. The Linux battery reporting continues to suggest run times mostly between 14 and 18 hours while surfing over wifi -- I do keep the screen brightness down at night, which helps.

The real dock (WD15) might be here tomorrow, after the carrier today gave their infamous "Mechanical delay" excuse that comes any time we have a snowfall.