KB update will roll out to all the Windows 10 users. You can still find the default Microsoft News app in the Start Menu, which has the weather widget.
You can search for a specific topic under My Interests in the personalization feed. It was working when I linked the Microsoft account. To my dismay, the items that I kept in the news and interests widgets did not get saved in the My Saves section. My saves will contain all the saved stories from the news feeds saved for later. You can see all the selected interests under Followed Interests. In the same way, I can see Markets, Career Advice, Credit Advice, Entrepreneurship, Personal Finance, Investing, Real Estate, Saving Money, etc., under the Money interests. Related : How to Fix Outlook 2016 not working in Windows 10 - Basic Solutions Other Features and Details