I always think the Core 2 Duo was an inflection point in terms of performance. Before that every new operating system release seemed slow on even the most moder

I always think the Core 2 Duo was an inflection point in terms of performance. Before that every new operating system release seemed slow on even the most modern hardware. After it was fine. Having said that my 8GB MacBook Air runs the unit tests for my current project four times faster than my 2018 i7 Mac. I will upgrade within a couple of years.