OSSTMMPerimeter ..?

Just a note; was struck by the OSSTMM approach towards the structure of infrastructure. [Disclaimer] though I am quite a fan of the OSSTMM approach (and do want to write up tons of whitepapers linking it with my ideas for moving forward in the InfoSec field without having to revert to #ditchcyber bla), I feel there’s a snag in it:
The analysis part seems to still take a perimetered, though onion, approach. The Defense in Breath is there, for sure, but still the main (sic) focus is on the primary axis of the access path(s). Does this still work with the clouds out there and all, focused as they are on principalled agnostics on where your data and ‘systems’ might hang out?

OK yes now I will go study the OSSTMM materials in depth to see whether this is just my impression and I’m proven horribly wrong, or …

So i’ll leave you with:

[Hardly a street, next to Yonge]