Yes, this is what I use now, SMD versions of the .1" pin headers (SMD allows to stack indefinitely), but:

- The distances you can get are limited to a small range (roughly the height of the male header pins).

- The 1-row versions are not shrouded, meaning that it's easy to mis-plug the pcbs (put pin 1 into the slot for pin 2 accidentally).

A Sullins connector doesn't have this problem, but of course doesn't allow parallel mounting of pcbs but at a 90 degree angle.