Perhaps, but that's orthogonal. JITs don't just come with ideal production set sampling either after all. They only capture snippets, and rarely re-optimize already compiled functions in the face of changing workloads or new information. You can do crowd-sourced profiles (like Android does), but that's a completely independent set of infrastructure from JIT vs. AOT. You can feed that same profile to PGO for AOT. In fact, that's how Android uses it. They don't feed the profile to the JIT, they feed it to their offline, install-time or idle-maintenance AOT compiler.