ChaoscripT
Regular Contributor
The older RT-AX86U (non-pro) was an excellent purchase three years ago.
Today, that model, along with the hardware-crippled RT-AX86U Pro is not recommended anymore. While the latter will get 3.0.0.6.xxx level firmware (which the non-pro model isn't getting, afaik), it only has a single 2.5GbE port that can be used for either WAN or LAN, hence 'hardware-crippled'.
While the original RT-AX86U also had a single 2.5GbE port, it was much less needed three years ago. Today, or in the foreseeable future, at least 2x 2.5GbE ports or higher are required or at least, desirable (whether you will benefit from it directly or it will make the router more valuable when you're ready to sell it).
So only RT-AX88U Pro & GT-AX6000 have dual 2.5GbE port.