Umm, nope, all facts really
You could argue about the HV or not HV thing (16.8v isnt very high voltage though compared to one of Lutach's 10s escs for example).
The hvmax IS almost as old as the emaxx itself, and other firms are ahead of the game with their sensorless designs that offer much more power (say ~1500watts compared to the hvmaxx's ~500-800 or so). Cant argue about the versatility issue- you can run any motor you like on the MMM etc.
$270 is alot of money for an old system thats just been given a few programming tweaks and a 5mm rotor, where as $300 nets you the latest and greatest (allbeit with teething issues that are now fixed).
Novak DO rely on the myth that sensored is best, theres enough speil about it on their website and the all the marketing we've all seen over the years.
And I have owned both systems as such, and the MMM is so much better for all the stated reasons- you cant put the hvmaxx in anything heavier than a stock erevo or emaxx and expect it to perform the same, it just cant produce the power required or pull the gearing that we'd like/need to do the vehicle justice.
If anyone would like to prove me wrong or rubbish my informed opinions Im more than happy to entertain a debate, which is what this thread is all about- why is the hvmaxx so weak compared to other systems (or ' why are other systems so much better than the hvmaxx? ' )...