What's new in Network Monitoring in the last 12 months?

I would like to hear what people have to say about these network monitoring topics:

1. New useful features and capabilities in PRTG, Solarwinds, and other monitoring tools in the last 12 months
2. New monitoring tools that did not exist before the last 12 months
3. What is one useful thing YOU have learned in network monitoring in the last 12 months (doesn't have to a be a new technology or feature).
4. What's else has changed about network monitoring in 2018, versus say 2014 or 2015, if anything?