H the V. It doesn't seem to have caught on around here, ... "I have observed that the followers that I consider the most proficient in my geographical area are capable of adapting to any embrace offered by a leader within my geographical area. It follows that it is possible for one person to adapt to many styles."
For me, it's not about the distance from the partner, it's about the position (and angle) relative to the partner. Shared weight is different from standing on your own balance, but since even OE nuevo dancers do volcadas, shared weight isn't all that alien even for those who don't dance apilado regularly.
There are some changes the follower has to make in how she executes certain moves like ochos and molinete in an apilado/milonguero embrace compared to OE, nuevo, or what's now popularly (and incorrectly) called "salon". But for me, the transition to a pronounced V embrace with my head facing right changes everything, not just the technique involved for a few specific moves based on a the changed principle of crossing instead of pivoting.