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RAM can no longer be upgraded and most people buy computers expecting to hold on to them for 6-10 years. They configure their purchase for what they WILL need in 6-10 years. They do not buy what is good enough for now but will almost certainly be inadequate later. Do you really expect 8 GB that can’t be updated and with no speed issues now to be just hunky dorie 4-6 years out? I’m certainly don’t and that’s not even taking into account the increased likelihood of SSD failures that will be a consequence of the OS compensating for inadequate RAM by physically assaulting the SSD. That extra $200 for 16GB future proofs my purchase now. It’s insurance against needing to buy a whole new computer in 3-4 years for 4-6 times the cost of an additional 8GB of RAM in the present.
This right here. Future proofing is much cheaper in the long run. I only got the 8GB model as a transition machine until the M1X MacBooks launch.
 
8gigs ram?..... in 2021? ..... not usable.
I'm doing large/heavy Xcode, Android Studio and embedded development along with some Photoshop and Illustrator on design files on a base MBA... can't see the performance difference between it and my 2019 8-core i9, 64GB MBP16 (e.g. on a full clean/build) so in my and I'd argue most use cases that statement is false.
 
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