What is IoT Yocto's migration policy?

What is IoT Yocto’s migration policy?

The general guideline is to migrate the Linux kernel and Yocto every two years using the appropriate LTS version. For example, we provide Yocto Kirkstone (LTS) + Kernel 5.15 (LTS), and Scarthgap (LTS) + Kernel 6.6 (LTS)