R-32 and R-454b

Anyone here started using any of the new refrigerants yet or install any of the new equipment that uses it? I know there are extra safety precautions that are recommended with them and extra safety equipment that needs to be installed inside the airhandler. From the gross lack of knowledge, skill and lack of caring from guys in apt maintenance when it comes to hvac I am curious how the transition to the new equipment will go or if property managment companies will either require their techs to learn it or just make them stop working on it and vendor it.

From what I have seen the refrigerant ain't explosive and still takes a lot to ignite them, they are only considered slightly more flammable than R-410a.