I got the March update today and it still didn't fix my Bluetooth issues with texts in the car. I am not real happy right now. I would have thought Google would have fixed it by now
BT, in the wild, is a mess... There are a bunch of flavors and versions, all only partially compatible with each other. The automotive industry, in particular, is a hot mess. The technology in the cars is usually archaic, especially when compared to current gen phones.
It's one of the primary reasons for the push for things like Android Auto and Apple Auto... The tech guys frustrated that the car guys are out to lunch, so they are trying to wrestle back control of the interface.