I'd say about 95% of the new resi construction I've worked on has had "sideways" receptacles.
And from Chicago all the way to the state line - all these towns are piped... you might get an allowance for flex / MC, but it's usually limited to fished installs or a certain length exiting a cavity before you have to transition to pipe.
And it's always amusing to see folks (generally speaking, English is their 2nd language) who go to Home Despot, but NM, and then head east, back into Gurnee or Waukegan - both hard core pipe towns.
