Your post is still somewhat misleading.I never said it was, so apologies if my post came across that way.
I just meant that the MBA as a whole will be fine with 8Gb RAM. Unless you do something requiring heavy CPU & GPU. What I should have added is in which case the MBP should be considered.
My point is you don’t need heavy CPU or GPU to use a lot of memory. It really depends on the type of workload. For example some heavy multitasking business app type workloads can be quite RAM hungry without stressing the CPU that much.
It’s even worse with VMs. You can use up half your 8 GB memory and not actually be doing anything, with your CPU near idle.
Meanwhile, some heavy CPU workloads run just fine on 4 GB RAM.