Developers won't be designing their games for that amount of memory, especially with those exorbitant prices. 32GB users are an extreme minority and it isn't worth the investment in developing game assets for such a small audience.
Maybe when the Korean/Chinese cartels are done colluding to fix prices and/or the Chinese government finishes their investigation into the practices while standing up their own fabs the prices will go down, more people will fit more memory in, and the games will take advantage of the increased headroom. Until then 16GB is fine.
I paid £44 per pair for my memory from OCUK a year and a half ago, it now costs £90. That is absurd and outrageous.