That could certainly make it more difficult to exploit, sure, but keep in mind that being able to force a specific value change is not a hard requirement for th

That could certainly make it more difficult to exploit, sure, but keep in mind that being able to force a specific value change is not a hard requirement for this to be a security bug. Even then, memory vendors tend to want to compete on frequency and access timings, which means doing any additional work not strictly required by the JEDEC standard will make their product appear worse than competing products, so I doubt they will want to do that. Plus a similar technique could actually be done by the CPU's memory controller to similar effect, and historically DRAM design has favored pushing things to the controller when possible.