If you are using a MacBook for work, get it with 16GB. 200 Euro is at most a few hours of salary for a developer in a western country and it will improve heavy workflows (JetBrains IDEs, Docker, etc.) a lot.
If it is a personal Mac, I would still go for the 16GB version, but purely for longevity. With 16GB you can probably use the MacBook longer. Also, less swapping means less SSD wear.
(16GB should really have been the default, at least on the MacBook Pro.)
I meant that they just shouldn't sell the Pro with 8GB. I know that the meaning of 'Pro' is somewhat debated, but if they want to address professional developers and creatives, 8GB is just too little.
Also, 8GB additional memory is not expensive at cost price. They could use the different amounts of baseline memory as a differentiator between the Air and Pro, especially now that the delta between the Air and Pro is so small (same SoC plus one more GPU core, Touch Bar that a lot of people hate, better screen).
If it is a personal Mac, I would still go for the 16GB version, but purely for longevity. With 16GB you can probably use the MacBook longer. Also, less swapping means less SSD wear.
(16GB should really have been the default, at least on the MacBook Pro.)