The thing you didn’t notice is that you significantly decreased the service life of the permanent storage on the device, because it ABSOLUTELY dips into swap far more frequently than models with more memory, and all high-speed SSD technologies that I’m aware of have limited lifetime write capacity before performance and fidelity start to degrade.

The MBPs (MBAs too in my opinion, but that’s more debate as it’s the “entry level” laptop) should have a minimum ram config of 16gb. 8gb MBP is honestly a really dumb spec level to purchase anyways - if you want something with that little RAM in laptop form, get the MBA.