Not only does it need to do everything from memory management to job scheduling, it also has all of the UI and graphics driver complexity blended in. Usually that’s a different layer that the kernel historically didn’t worry about, it would be as if GTK is part of Linux, along with the programming language. Then there’s shit like WebAssembly and WebGL, databases, sandboxing, permissions, user management… A Brower is like a cross platform OS built to run on another OS
Y’know, you’re right & that’s wild. I guess I should have known, but didn’t assume that they have like 600m in unrelated investments. Though the burn rate is quite a lot too, so they probably would scale back browser dev a lot if it lost its profitability & become a pure VC kinda org