Good points! It's true that switching times in transistors is a thing! There's even something called gate delay! I remember working on a system where 1 ns dela

Good points! It's true that switching times in transistors is a thing! There's even something called gate delay! I remember working on a system where 1 ns delays were available in a chain of transistor gates on the silicon die. You would do some tests and adjust the delay +/- by adding or removing a gate (selectable via some logic) and once you got the good results in your calibration you'd lock in the delay. This allowed for some synchronous signals when there was variation from different foundry processes and a variety of PCB layout distances between chips.