I had an ASUS N66U for over five years. It was released in 2011 [0] and I got rid of it last year for a mesh system. But looking at Asus’ support page, it still gets firmware updates [1] with the most recent in June.
Most reputable vendors put out firmware updates for a long time. Routers should not be disposable consumer devices, I think.
I have this belief both from a security standpoint (frequent updates are important) but also as someone who supports quite a few family members. Switching out routers over the phone is not easy for an 80 year old.
[0] https://wikidevi.com/wiki/ASUS_RT-N66U
[1] https://www.asus.com/us/Networking/RTN66U/HelpDesk_BIOS/
