The Google Tensor chip is a solid first outing for Google’s in-house chip. The main critique is that it doesn’t use very new ARM core technology. The cortex A76 is not as robust as the newer A77 and A78 cores.
The decision to use older technology is confusing, but Google stands firmly behind the decision. It is probably too early to see if the Google Tensor chip will have a staying power. For now, Google is still lagging behind the rest of the pack in the Android space.