Mozilla spent years working on Servo only to sunset it

There is a long history of Mozilla sinking time and money into projects that they eventually just drop without ceremony. I'm sure a lot of those have floundered in terms of development, too, but what used to be Mozilla Labs is pretty much a testament to poor follow-through.

Honestly, focusing on the browser and rebranded Mullvad is probably their safest bet until an actual good idea comes by (and AI ain't it).