Big Data is far from dead. On the contrary, people (on most daily projects) are more mindful now wrt all Big Data liabilities and benefits (infrastructure cost vs. what you get from it) thanks to the experience of the failed ones. But many analytics companies are thriving.

Also, using BigQuery as a metric of how Big Data is used is, IMHO, wrong. Real analytics companies usually have custom solutions because BigQuery is too expensive for any serious usage unless you are Google.