Raspberry Pi releases PCIe FFC connector specifications, new HAT+ standard

It'd be awesome if there's HAT+ for multi-port and multi-GbE Ethernet, and this can be a very popular poor man's SDN kit.

There's one for RPi CM4, but with RPi 5 it will be much better in stability with the native heat sink available in the latter [1].

The additional two USB-3 ports on RPi 5 can be transformed to two 2.5 GbE ports, and another 2.5 GbE on the PCIe interface. Overall it probably can support 1 GbE (built-in) and additional 3-port 2.5 GbE via HAT+ extension.

[1] Getting Started with Dual Gigabit Ethernet Carrier Board for Raspberry Pi Compute Module 4:

https://wiki.seeedstudio.com/Dual-Gigabit-Ethernet-Carrier-B...

Previous discussion https://news.ycombinator.com/item?id=38569121 of official announcement https://www.raspberrypi.com/news/double-standards/

Now please sell me RP1 chips!