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AoT is still a thing. Presumably a lot of the JIT improvements would also improve the generation of AoT-compiled code.

I hope that’s the case but I’d feel a lot better to see it in print.

do you mean NativeAoT? it's mentioned a few times in the post

Native AOT is seeing a lot of use within Microsoft products too. Some bits of the .NET SDK use it, and C# Dev Kit (the C# extension for VS Code) uses it extensively in version 11. It brings a lot of performance to .NET.

AoT uses the same codegen (mostly) as the JIT so if you see a JIT improvement it's possible NativeAOT/ilc picked up that improvement too.

Unless it's a runtime-only optimization, like guarded devirtualization... there's no straightforward way for an AOT compiler to do that without profiling data.

It still exists, it's still a bit quirky because of the way you need to match CPU to binary (e.g. some opcode extensions only existing on some CPUs)