[Always42]

I use altium professionaly, and kicad for personal projects.

it it more than capable for what I need (think simple 4layer boards) and overall kicad 7 has been a great experience on apple silicon.

I have not attempted high layer count or high speed design (ddr4 ram etc.). so I cannot speak to how it performs here.

but I plan to continue using it for personal projects. if I where to do a startup I would also probably use kicad.

[mirasmithy]

While it's not quite as high speed as DDR4, I've designed some simple PCIe board with KiCAD (OCuLink to PCIe x4, M2 A+E to 2.5GbE). It does require some hand-holding though.

Edit: Completing comment