Currently have the TP-Link Archer C7 v2, which has been working flawlessly with absolutely no problems for 5 years on OpenWrt. However as time went by, I kept adding stuff on it, like Wireguard, SSD NAS, Ethereum staking (which is network-intensive) etc. and also recently upgraded my internet connection to 200Mbps Verizon FIOS. I feel the C7 is being pushed to its limits, and looking for an upgrade for a more powerful router. So here are my requirements:
How fast is your internet connection? 200Mpbs
Do you need Wi-Fi? Both 2.4GHz and 5GHz.
Do you need Gigabit Ethernet? Yes
Do you need USB ports? How many? USB 2.0 or 3.0? At least one USB 2.0 (USB 3.0 preferred)
How many family members/devices must the router support? About 15 devices
What other services do you want? Wireguard, miniDLNA media server, SSD NAS, DDNS.
Price range: About $200
I am not considering RPi as a solution. Saw some suggesting R7800 but not sure. My main requirement is to be at least as compatible and reliable as the C7, only more powerful.
A used Linksys EA8500 is another alternative (4x4 and same ipq806x target as the C2600) that looks like it runs ~$20 less shipped than a C2600 on ebay currently - for a reason: the EA8500 case needs to be opened, and the serial pins connected with a serial to USB dongle to a computer to flash it the first time through a serial console (e.g., PuTTY). It's not too complicated, but could be more trouble than you want to bother with.
From my point of view this issue can be regarded as being resolved, but since I follow the latest stable my uptime is limited by the release cycles and maintenance I do. However, I do not have unscheduled reboots since I run them at fixed frequency. I have four C2600 that are playing up without the extra as mentioned below, none reboots by itself with the fixed frequency settings. All are running 21.02.1 for a while now.
I added this to /etc/rc.local (through LuCI System > Startup > [Local Startup]):