[Raqbit]

I'm assuming they chose Micro-HDMI here so they could use the same part they use on the Pi 5.

[Cumpiler69]

Yeah but the first two generations of pi shipped with full size HDMI on the same footprint.

[Raqbit]

The first two generations of the Pi only had a single HDMI output - later generations have 2 and hence required smaller HDMI ports to be able to keep the Pi footprint.