Alexa vs. Siri: The big race for the best virtual assistant

"Amazon, Google, Microsoft racing to make their virtual assistants more powerful and pervasive," per Wall Street Journal front-pager by Laura Stevens and Tripp Mickle:

• "Amazon is adding hundreds of engineers to the Alexa program and giving it hiring preference over other divisions."
• "Apple still has the greatest reach among voice assistants, with Siri accessed monthly on more than 375 million Apple devices across 36 countries."
• Amazon also has been aggressively signing deals with other companies to add Alexa to products ranging from Ford Motor Co.cars to Sears Holdings Corp.'s Kenmore refrigerators."
• "Google said this week that it would open its assistant to other speaker makers including Sony Corp. , and to appliance makers like LG Electronics Inc., to incorporate the assistant into dryers and vacuums."