Hi Rob,
I'm a long time follower of yours. Great work on the Polycasts!
What do you think will be the life span for polymer 2? Do you think its a safe route to start a new project in polymer2?
If you're doing something new I would really look at Polymer 3. I imagine Polymer 2 will be supported for quite some time, but 3.0 and Lit HTML are just really cool and give you much easier access to things like npm.