I have 32 Gb RAM.
Some plugins, like Omnisphere, use a LOT of RAM. Others, not so much, so it depends on your particular setup.
If your setup is full of VST's, the extra RAM is a blessing.
Anyway, when I upgraded to 32 Gb, I really experience a big leap in terms of speed and reliability.
Now I can load a LOT of VST's without struggle.