Great work :) When we switched from a monolith to microservices in a previous job, this was mentioned a lot - both internally and to external clients in presentations etc.
I agree, I think the fact that it's not called "the [platform/software] way" is a big factor in its success - it's easier to quote publicly and to external clients when it's seen as a more agnostic set of principles.
Out of interest, in hindsight do you think that any of the 12 factors could be tweaked/improved (since it was originally written)?