Здравствуйте.

Читаю сейчас по R2R -- https://docs.microsoft.com/en-us/dotnet/core/deploying/ready-to-run
Там параграф:

Interaction with tiered compilation
Ahead-of-time generated code is not as highly optimized as code produced by the JIT. To address this issue, tiered compilation will replace commonly used ReadyToRun methods with JIT-generated methods.

А почему, что мешает? Runtime статистики не хватает или еще чего?