So if I show up in person and talk to an ordained teacher at the agreed upon building I will get a "better" Dharma than if I interact with the same teacher via chat, phone or video-conferencing? Is the "specialness" (that some "purists" claim comes with physical presence of a teacher) the smell they give off? Is the trick being your smell mixing with their smell? I know that's silly sounding and that's the point because purists are being silly with this issue in my view. Whatever happened to the idea of 84,000 different ways of teaching the Dharma? I fully support traditional sanghas and a lot of other Buddhist traditions. However, we practice a belief system that was developed by a man who had NO Roshi or other Buddhist "Master" to help him. Even ordained teachers who wander the temples and meditation centers will tell you that no amount of interaction with a teacher will enlighten you. In the end it is each one of us who has to do the work. It doesn't matter if a Zen Master stands on his head while chanting unless you do the work yourself. That's not to say that interaction with an ordained teach is WRONG--It's not wrong AT ALL. It's very important and should remain intact but there is plently of room and elasticity in Buddhism to allow for iSanghas.
However, at what point are we clinging to something simply because "that's the way it's always been done?" Isn't being a "purist" in this case attaching way too much importance to the ritual of the student/teacher relationship? As well as the ritual of formal buildings and temples? Don't get me wrong I want to maintain these wonderful buildings and tradition of having a teacher to work with in person. However, I don't see "iSanghas" as a disease that will ruin Buddhism, which is an attitude I see behind much of this hyperventilation over these new developments in Buddhism. The original "temples" were forests. So was the change that would come with the advent of more formal temples with ornate carvings, golden statues and beautiful artwork poisoning the "traditional forest sangha" set-up? What about the great masters who left the temples after a time to study alone in a cave? Were they not "credible teachers?"
Were those caves hindrances to their practice? Tell that to all the great teachers who have come from that tradition, which is especially strong in Tibetan Buddhism. Tell Buddhadharma that the meditation he was doing in that cave wasn't "the real Dharma" because there was no teacher right there to constantly whack him on the back. So my point is that change is inevitable and we seem to be able to see that in our daily lives with learning to adapt to changes at work, in relationships and in all areas of life. Yet I have seen a strange stubborn streak in some practitioners when it comes to change in Buddhism seen here with the virtual sanghas and online interactions with a teacher. Hell, there are STILL people who say that Mahayanist Buddhists aren't TRUE Buddhists!! Some people are still fighting that change, which was a difference that arose ages ago.