You’re missing their main goal: having an easier-to-change codebase.
Apparently this is way more economically rewarding than performance for Facebook.
With that in mind, who cares if the site is slow (btw this is the only complaint of your rant). If the software requires a few devs to change and a few eyes to maintain, they can literally scale as much as they want. And actually now they’re probably in a way better position than they would if they had developed a super performant but unmaintainable site.
The quote, premature optimization is the root of all evil, is still very much valid imho.
Apparently this is way more economically rewarding than performance for Facebook.
With that in mind, who cares if the site is slow (btw this is the only complaint of your rant). If the software requires a few devs to change and a few eyes to maintain, they can literally scale as much as they want. And actually now they’re probably in a way better position than they would if they had developed a super performant but unmaintainable site.
The quote, premature optimization is the root of all evil, is still very much valid imho.