Fundamentally, maintaining MDN is costly because of the rate of instability in rapidly changing browser APIs. Those APIs change quickly and inconsistently because they’re managed by a centralized cabal of a few corporations with a combined multiple trillions of dollars in market cap. And yet, somehow it’s Mozilla, the browser vendor with the least money, that ends up saddling the cost for MDN. Why is this? In general…
MDN is a wiki and maintained by innumerable contributors