From the follow on of the provided Twitter link in Jeff's website and based on the latest status updates, it seems that the 4-port Ethernet CM4 carrier or Raspberry Router from Blinkinlabs is taking shape now [1].
It uses KSZ9897 switch and LAN7431 PCIe-to-Ethernet adapter from Microchip, and the former does supports VLAN and LACP [2]. The fact that the switch chip can supports up to 7-port Ethernet thus it is possible to make a version of Raspberry Router that can be used in company setting (Mikrotik's customers) in addition to home networks.
[1]https://mobile.twitter.com/cibomahto/status/1364520950763573...