Many of the routers on the market have the same chips inside them so they are all much of a muchness as far as reliability is concerned.
Sort of.
Chips are only 1/3 of the design, plenty of scope for the other 2/3 of the design to be screwed up, that's before we start talking about implementation and PSS. You even said it yourself in your prior statement
"I wonder about some component overheating or something"
(PSS = Post-Sales Support)