Jonas Schneider wrote:

Do we even need crossover cables anymore?

Technically only* gigabit devices are required to support auto MDI/MDI-X
switching, but in practice most 10/100 devices have also supported it
for many years.
[*] not sure about 10Gbe and faster, I've only used it over fibre, and
with a switch between devices, but I would expect it to be auto over
copper too.