At the top of this blog post about custom routing, there is a disclaimer that the information is outdated and no longer recommended. There is no link to what is considered the current information.
Does the disclaimer imply that custom routing shouldn't be used at all any more? If so, how are we supposed to solve the "hotspot" problem alluded to in the post? And how can one attain the performance benefits referenced in the "Custom Routing is FAST" section?