I've gone to PFSense on an older i5 Dell 390 mini-tower. 4 pci-e slots stuffed with Intel 2.5gb NIC's. Latest PFSense supports them. Cost was 90 bucks for the NIC's. The Dell, boo hiss its an "old" PC, was free. Works great and it is fast, fast, fast. I'm only using the basic ie simple features. I installed pfblockerng but took it out. I didn't have time to do it correctly as there is a learning curve.
BUT I'm using the AX-86U as an AP/LAN switch. Its 2.5gb port as a LAN port going to the 2.5gb on the PFSense router. Everything at the fastest I can be with my ISP. Getting 1.4gbs-1.8gbs via fast.com and xfinity test site.
Which means I check for updated firmware regularly. Being the pattern of updates had stopped I though maybe RMerlin was sick, something happened to him.
I'm very glad its just an ASUS thing.
On my recommendation I've lost track of how many folks have bought an AX-86U. I have a hard time believing ASUS would give up on it. It is one of the best values/performing routers to come along in a long time.
Look how long Netgear has kept the R7800 going..............