I think you are mixing up hiberfil.sys with pagefile.sys.
Hiberfil.sys is only written when Windows performs a suspend to disk. I use that mode often instead of shutdown and base on own experience Windows only write used ram to this file: the more RAM is used the longer suspend to disk takes.
It may also be used when you perform a full reboot (not just the "fast reboot" that is done usually which is a partial suspend to disk where only the kernel memory is saved).
In both cases the maximum amount of RAM available makes on difference. Therefore you don't have to care about the maximum RAM available to Windows, it should not have an effect on the life-time of the SSD.