Hopefully not. They're clearly batting down the hatches and trying to centralise the market around WP.org — at least as far as The Verge calls ACF a "WP Engine plug-in", and (although I'm not sure how accurate that is) Mullenweg shares that impression.

This all feels like an odd subversion of open source software, where maybe the commercial branches of WP are spread thin financially and need to play hardball with rivals to corner the market? I honestly don't know, but Mullenweg's belligerent rhetoric re WP Engine seems desperate and over the top.

I'm reminded of that other time a happy-go-lucky FLOSS founder turned monopolist, although Moxie Marlinspike wasn't suing and being countersued when he personally shut down a third party Signal client in Github comments...