Whether there is or is not a "bandwagon effect" the common denominator here is said vendor's customer service and at times product offering(tunes) SUCK.... I held my tongue a long time, and it appears others have too, regarding the flailing customer service from BBR, not to mention tunes that are less than subpar.
For alot of us, this is not our first rodeo with knowing whether an email tune or a dyno tune will be adequate for our build. I've paid more money having my Harley tuned than most have invested in there whole car in this forum and the topic of email tunes vs. a dyno tune is not limited to the Mustang world only I assure you.
I agree a "dyno tune" is better than an email tune, HOWEVER, a dyno tune does little in real world driving conditions and tunes for WFO and A/F with a modest attempt at load bearing if the dyno tuner actually knows how to run the dyno.
The BEST method is dyno + datalogging the car in real time. This takes almost all the data the tuner needs for the car being tweaked into consideration and under real time application, hence, tuning should be more accurate. Then there is adaptive learning and the use of wideband tuning that assists in smoothing out the miniscual idiosyncracies left on the table post tune.
IMO, threads like this shed light on a sore that has been under the skin for awhile and can have a POSITIVE outcome if handled correctly by both parties.
TO ME, this IS the best Mustang forum on the net bar none. It's packed with solid info from guys in the business you can trust.
I do not wish ill on anyone or any business but if there is a problem..........expose it and work together on fixing it. Remaining silent can turn a relatively benign problem into a cancer if it remains unchecked.