I guess we have different perspectives. Why is there an implicit belief that Tesla shouldn't support all the standards? I'd like to see Tesla do the right thing - increase the number of usable fast charger stations. Even if a CHAdeMO adaptor is an "expensive product", so what? This is about customer experience, not engineering or orthodoxy. So what if this causes there to be MORE CHAdeMO stations? With an adapter, that would be good for the MS customer. It wouldn't encourage people to buy CHAdeMO "native" cars (they'll buy the better car and the number of available chargers is a factor in that determination). I honestly don't see why this isn't obvious.I don't think it's just NIH. I've pointed out before from an automaker perspective, having one socket that can do both AC and DC charging is more attractive than two. If CHAdeMO was a good solution, Tesla would have picked it for the Model S rather than going on their own (SAE DC didn't exist while the Model S was being developed).
And from an adapter perspective, if Tesla builds a CHAdeMO adapter now (which would be relatively expensive both for R&D and end product) there will be a positive feedback loop that encourages places to install more CHAdeMO stations. If instead Tesla waited for dual connector stations, the less expensive SAE DC adapter would become a viable option.
If the adapter would be hugely more expensive than the current adapters (I don't know anyone who would call a $600+ adapter cheap in the first place), they should just say so. Paraphrasing Chad, their continued silence is the worst possible scenario.
And for the record, could they have chosen a WORSE name than CHAdeMO??? A little marketing pixie dust would be a good thing.