Polymer is built for the world without Vue.js or React. They are slow and heavy weight compared to very very optimized DOM operations done by Vue.js or React.
I think the time for Polymer is gone, and it is better to forget that it exists.
I think the time for Polymer is gone, and it is better to forget that it exists.
If angular 1.5 was OK for thousands of devs over recent years then Polymer that is comparable to ng2 or react is more then enough.
Not to mention that for a world without polymer - some of biggest enterprises in the world are betting on it (and I don't mean just google here).
If you still want to use it, use it without Vue or React.
I did bundle my components into single file - even throwing in sass compilation so I think the problem is elsewhere ;-)