In December I wrote about package managers using git as a database, and how Cargo’s index, Homebrew’s taps, Go’s module proxy, and CocoaPods’ Specs repo all hit the same wall once their access patterns outgrew what a git repo is designed for.
The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.
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②宠粮产品：专业背书正在替代品牌溢价
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