How long do routers typically last before they have to be replaced? I have an Netgear R7800 that is probably 4-5 years old and I have been having intermittent drops/hangs lately. I haven’t tested anything yet but my gut tells me it’s the router.
There is no hard rule. Sometimes it's just the power adapter that is dying, not the router. You can use any adapter that provides the same voltage and at least the same current as the factory adapter.
I use this one for all my testing. It saves me from having to thread the power cord for each product through the turntable access tube!