Honestly, for what though? At this point bandwidth is more important than the actual ram amount. Texture quality is already really good with 16GBs, so what is 36GBs necessary for? Its not like there is going to be this huge push to higher than 4K resolution anytime soon.
I could see moving to 24GBs so you have more headroom for advanced ray-traying, but a 36GBs seems so unnecessary and will just make the GPU more expensive than needed.