Judging by Google’s own support website, this model is receiving OS updates until " Jun 2019"
Again, for what it’s worth, I have two Acer Cloudbooks (originally Windows OS, now Linux) and they have insanely long battery life. The battery is as big as the keyboard. With 37% full, I still have .5 hours to go. I assume these are similar.
Keyboards are another thing. I don’t lie them. But for casual use, movies, etc., they are fine.