Mowing down the test chain to reflect new testing values.
Tabulating support without the "big three" problem properties:

display: inline-flex;
align-(items|self): baseline;
flex-wrap: wrap-reverse;

These will need to be addressed at some point, but for now I'd like to concentrate on support for the non-esoteric properties.

The full test suite can be found in:

test/data/pairwise/flex-properties-full-suite.tsv
test/data/pairwise/flex-tests-full-suite.js
Accidentally committed an IP address.
Generated flex values.
Generated output.