Matt Mullenweg, CEO of Automattic, the company behind WordPress.com and other online publishing tools, is offering a glimpse into Tumblr’s future — the blogging site Automattic acquired from Verizon in 2019. On the Evening Standard’s “How to be a CEO” podcast, the WordPress founder offered a vision of Tumblr’s future direction, including its embrace of open source, plans for algorithmic choice, and use of AI technologies, among other things.