The first transistor was about half an inch high. That's mammoth by today's standards, when 7 million transistors can fit on a single computer chip. It was nevertheless an amazing piece of technology.

If you look at a higher-current LiIon battery BMS, you will inevitably find two FETs wired up like that, or even two rows of FETs put in parallel! Just like with NPN and PNP transistors ...