I can see how the memory hierarchy will have layers removed, but it still exists because registers are where operations on data predominantly take place. So you

I can see how the memory hierarchy will have layers removed, but it still exists because registers are where operations on data predominantly take place. So you still need to identify small working sets of variables that you extract return values from. I can see how a lot of caching logic will be obviated but not the principle of memory hierarchy, which says ‘load small batches of problem set, solve, store results and repeat’.