It's already in the 2016 Tacoma. I've looked at the internet postings on the internet. This stuff is flammable and very expensive. A 10 pound cylinder cost about $700. It's already used in some Cadillac models and Mercedes. New and special equipment is needed to service these new AC systems. Get ready to be zinged by the "stealerships."
Last I heard, about 50% of vehicles world-wide are now manufactured with this new gas. Same thing happened when R12 was to be replaced - many objected, but we just got on with the R134a. We won't have a say, it'll just happen.
It's also just a stop-gap measure. It will most likely be part of the phase-outs in 2020's. Nobody knows what to replace it with. All the better options are either even more flammable or require ridiculously high pressures.
If anyone here knows of the Prius with an electric motor driven compressor, they would clearly be aware that it requires a high dielectric Nippon Denso ND-11 compatible oil and segregated tools dedicated for use with electric compressor AC tools. For a very long time, for future Prii using R1234yf, it would be more likely than not, only Toyota/Lexus dealers and hybrid specialist shops will be the only place that one would want their car serviced. Lack of competition and diversity of other outlets destines the owner to a high cost captive market and "thinner wallets. And, for the 70% of the consumers who buy on image, how many will check to see what refrigerant the car uses and needs. The same thing happened with the "deleted spare tire." Most did not become aware until they have a flat tire. Also, how many got a humongous repair bill when they or the repair shop mistakenly used PAG oil in their Prius.
