Well, and all I am looking for right now is security and bug fixes / updates. I have the features I need right now, and would still have them in a munch simpler router than an Asus. For me, the time to upgrade would be:
1. If my existing router physically dies
2. I get to the point where I can take advantage of a new WiFi standard, and therefore need new hardware.
Right now, my iPhone 12 Pro Max is my ONLY WiFi 6 device (actively used with WiFi)
I have an Apple TV in use that supports WiFi 6, but it's connected by Ethernet. Everything else wireless in use, is either WiFi 5, or 4, or below.
Remember, I only use WiFi as a last resort, I try to use Ethernet first.