I have a loaded late-2013; it feels weird that I can have basically any laptop in the world that I want, but there's such marginal improvement in 2015 vs. 2013,

I have a loaded late-2013; it feels weird that I can have basically any laptop in the world that I want, but there's such marginal improvement in 2015 vs. 2013, and actual regression from 2015 to 2018, that my mac is almost 5 years old. (I have a 64GB RAM Acer for workstation use, though.)