Unfortunately, they blew it. They created an over-engineered, over-complicated, bloated, heavy mess. Jeff bet on Moore's Law meaning that bandwidth/speed would eventually negate the bloat, but instead the world moved to low powered devices with mobile bandwidth.
They've spent years trying to get infinite scrolling working OK and installation OK. Why? Imagine if they'd actually used all their brainpower on features that forum owners actually wanted: automated spam tools, automated admin tasks, one-click install to any hosting plan (yes using PHP if necessary).
All the years of wasted talent, and now the other forum products have overtaken them on usability/maintainability. And they are STILL trying to fix the hijacked browser search feature, that you get lost in infinite scroll, and that you need to run a separate VM to run something as simple as forum software.
LESSON: beware second-system-syndrome, beware the CEO who has personal tech vendetas which are misaligned with your product strategy, and beware creating a team consisting solely of talented engineers who will do one thing: OVER-ENGINEER.