Canonical’s announced a major shift in its kernel selection process for future Ubuntu releases. An “aggressive kernel version commitment policy” pivot will see it ship the latest upstream kernel code in development at the time of a new Ubuntu release.
Original announcement: Kernel Version Selection for Ubuntu Releases
I can see Mint just adopting “Latest Ubuntu LTS, work latest Linux LTS” as their choice strategy. They’ve usually preferred older but more stable kernels and drivers before, anyway.