“An acquisition spree by Apple, Amazon, Facebook, Google and Microsoft eliminated potential rivals and concentrated brain power in this critical field. Last year saw a record 231 acquisitions of AI startups, up from 42 in 2014, according to data from CB Insights.” https://www.google.com/amp/s/www.bloomberg.com/amp/news/articles/2020-03-16/big-tech-swallows-most-of-the-hot-ai-startups