alt Hacker NewsI doubt anyone here is working to 1% of fb scale, let alone 10%.
The answer to "why Hack" needs to be viewed in the historical context of "when Hack" and what was happening (or not) in the php ecosystem at that time.
Things have changed a lot since, in terms of performance, language longevity, ecosystem etc. Its a perfectly reasonable language to adopt for many orgs.
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ZiiS • last Monday at 12:01 PM
Some people here work at (exactly) 100% of fb scale.
More specifically, Hack was developed during the time when it looked like the PHP project wasn't going anywhere (it was stuck at version 5.x for ten years while version 6 was in the works, then abandoned, then version 7 was developed based on version 5 and finally released in 2015).