Polls are still alive and active. In fact, the Poll feature in this new version is much nicer and easier to use. Whenever you start a new thread, you will see a link to begin creating your poll located just below the text box. See the screenshot below:
In the FAQ there is a Q&A on Polls:
Quote
[-] How do I put a poll in my post? Putting a poll in your post is simple.
If polls are enabled, start by creating a new post in a forum. Below the body of your post, you will see a text box that allows you to specify how many polls you want to have in your post and the system will guide you through the rest.