I see as a tendency a shift of the partner strategies from big enterprise companies, like Microsoft. Previously the strategy was to get as many partner as possible to deal, further develop or simply resell the technology. Nowadays there is a strategy shift rather to cooperate only with some specific companies that deal with key technologies, like areas of artificial intelligence, machine learning or Blockchain.
With other words, I would say as the strategy was previously "get partner companies to work together"; nowadays rather getting in the direction "get the core technologies to work for me".
