Available in 16gb RAM ($1600) and 32gb RAM models ($2000)
Prices have gone up slightly this generation. Whereas the $1500-1600 price point could have gotten you a 17" screen, this only buys a 15" as standard. However given how much smaller and thinner things are now, there is arguably less of a need. From the 20 series onwards, the era of "thicc" laptops has officially come to an end. The tradeoff between a slightly bigger screen size may no longer seem worth it. Wheras the 10 series achieved desktop replacement performance parity and value, the 20 series successfully got things small enough to be truly mobile and convenient.
64 gb variants are available in theory for future proofing but in our experience by the time games start requiring that much memory, we will need to be on one or two generations of GPU beyond this one. Most games are fine with 8gb of RAM or even 4 GB while current gen titles are starting to hit the 16GB wall. Beyond that raytracing is still in it's infancy with less than 20 games that support it and there just isnt enough value in paying a premium to be an early adopter at this time. The raytracing generation will likely have its own "10 series moment" in the future when the technology matures.
The video just below this is also a good brief primer on Full HD, higher refresh vs higher resolution, standard refresh. The answer ultimately being "it depends" and more specifically, on what you play.