Same as the macbook air.
The cost cutting has to affect something and the SSD speed is one of them. They are obviously using different cheaper chips in the 2019 macbook air and the base macbook pro.
It is correct that the smaller sizes are slower, they are slower than the higher end counterparts.
For example the new 2019 air is about the same write speed but 35% slower reads than the 2018 version.
https://www.macrumors.com/2019/07/15/macbook-air-2019-slower-ssd/
At the end of the day your into diminishing returns once you get past 1000mb/s unless your doing really heavy workflows that these machines aren't designed to do.
At the end of the day the 13" is a mid range laptop at best, integrated GPU with a max of 16gb of ram its not made for high intensity workflows and apple have better machines for people that need more performance.
The cost cutting has to affect something and the SSD speed is one of them. They are obviously using different cheaper chips in the 2019 macbook air and the base macbook pro.
It is correct that the smaller sizes are slower, they are slower than the higher end counterparts.
For example the new 2019 air is about the same write speed but 35% slower reads than the 2018 version.
https://www.macrumors.com/2019/07/15/macbook-air-2019-slower-ssd/
At the end of the day your into diminishing returns once you get past 1000mb/s unless your doing really heavy workflows that these machines aren't designed to do.
At the end of the day the 13" is a mid range laptop at best, integrated GPU with a max of 16gb of ram its not made for high intensity workflows and apple have better machines for people that need more performance.