The 386 supports four privilege rings (0 through 3), though in practice nearly all operating systems use just two: ring 0 for the kernel and ring 3 for user programs. Three privilege levels interact on every segment access: CPL (Current Privilege Level), DPL (Descriptor Privilege Level), and RPL (Requested Privilege Level).
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From the average web developer’s perspective, though, the status quo is subpar. WebAssembly is too complicated to use on the web, and you can never escape the feeling that you’re getting a second class experience. In our experience, WebAssembly is a power user feature that average developers don’t use, even if it would be a better technical choice for their project.