This is never an issue with number of engineers, it's an issue of business priorities.
Large tech companies have plenty of engineers to fix bugs, but most of them are on projects trying to 10X things instead of paying down debt.
Apple used to be unique in it's immunity to it, they even shipped an OS update claiming it was only big fixes and not features which is unthinkable these days. Over time there's much less focus on polish from them though.
Airbnb doesn't really follow that guide internally anymore. There's a lot of weird in there. I wish they'd publish the actual internal style and lint rules instead.
In something like a database zeroing or poisoning on free is probably a good idea. (These days probably all allocators should do it by default.)
Allocators are an interesting place to focus on for security. Chris did amazing work there for Blink that eventually rolled out to all of Chromium. The docs are a fun read.
People file incorrect tax amounts all the time. It's the government's job to verify the return and either refund you or request more money. There's a decent margin for error, and not all returns are audited so the IRS must also have a margin for error they're building policy and budgets around.
Large tech companies have plenty of engineers to fix bugs, but most of them are on projects trying to 10X things instead of paying down debt.
Apple used to be unique in it's immunity to it, they even shipped an OS update claiming it was only big fixes and not features which is unthinkable these days. Over time there's much less focus on polish from them though.
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