> Dynalink DL-WRX36

Not available outside the US :(

> Long-long term availability is a different problem, but different manufacturers move on.

Open hardware solves this. You've been able to buy the OpenWrt One from China and ship it anywhere in the world for a reasonable price, every single day since it was released, even when there were better options available. If no one's selling, there are factories willing to make very tiny batches.