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kotlinlang

Have some questions regarding buying new hardware for Android development. What is the most important hardware factor for fast build times and as fast as possible IDE (Intellij, Android Studio)? Is Gradle and Intellij "core sensitive"... I mean would 12 core Ryzen 9 be faster vs 8 core Ryzen 7? Is high class GPU of any help?

Disk speed and then CPU speed. I doubt the kotlin compiler is hardware-accelerated (uses the GPU) and the gpu doesn’t work very hard for a 2D app like IntelliJ.
I do think more cores will improve build times but I’m not sure.

Clearly, go with a NVMe drive such a Samsung 960 PRO, and go with 16GB ram at least. It is best (for now) to have less cores at higher performance as many tasks are not that parallelized.

You want a GPU good enough to handle multi screen with high-res if needed, but a $50 card should cover that and more.

I'm thinking about pci-e 4 disk (corsair mp600) and 64gb of ram :) Budget is around 1500€.

You could mix and match SSDs and RAID them, but I agree 64gb of ram may not be of much help.