You can buy FRAM (Ferroelectric RAM) which are effectively the same thing just in smaller package. But I have seen them only about few kB. However the amount of R/W operations is effectively unlimited,
Yes, although (like some flash technology) read cycles are slower than write cycles, and it takes longer to read a 0 bit and than 1 bit (or vice versa).
Phase-change memory is the most advanced high-endurance nvram, with Intel and Micron's XPoint being the most advanced to have hit production. If it had stuck around long enough for the RAMpocalypse, they'd probably sell out their production capacity.
It is the future, and has been the future for almost 40 years already! I bet that's what the hoverboards will use inside their microcontrollers — gotta drive those portable fusion reactors reliably!
Dataram, back in the day, made 'generic' core memory planes. That is, the had a relatively speaking simple electrical interface, and many vendors just implemented whatever was needed to hook it up to the vendors (usually) proprietary interface.
I have a couple I've been (very) slowly trying to get working with a modern-ish microcontroller with USB connectivity.
I have a little envelope of cores that I’ve been meaning to do something with for years, but they are just so tiny I haven’t wanted to mess with them. (Not sure when they were made, but I’m assuming fairly late based on the size.)
https://www.core64.io/buy
(I chatted with them at the VCFMW, Vintage Computer Festival Mid-Waste, and they are very cool.)
Wait, is each of the rings one bit?
I think MRAM is the future though.
I have a couple I've been (very) slowly trying to get working with a modern-ish microcontroller with USB connectivity.
PIM. https://www.ramxeed.com/tech-column/pim-basics-and-applicati...
And strictly speaking, this a not a von Neumann architecture anymore.