[Ozzie Goat]

I don't have a SPF, but I think this applies.

My car is now fifteen years old. Although the OEM spec has now changed twice, most changes cannot be retro-fitted.

Also true, after five years with the car it never ceases to amaze me what maintenance project is next. It's less about what's new now, and more about dialing in and optimizing what you have. After 15K miles on that car it's probably sorted.