Throughput is hardly the only meaningful performance limitation the Pi has, but it's already enough of a limitation to disqualify it. The RPi really just doesn't come close to being suitable as a router.
Any open hardware device that is suitable for wireless router duty and fits within a $50 budget would have to be essentially a standardized PCB for a single-band Atheros ath9k SoC. It would provide almost no benefit over the dozens of commercial off the shelf products that use those chips and almost universally run OpenWRT flawlessly.
The complexity of installing on any random device is almost entirely with determining what exactly is inside that device, since basically every vendor routinely changes everything inside the product without changing the model number. OpenWRT already has the infrastructure that solves the version maintenance problem, since they do automated builds of the OS and packages for all the various supported hardware platforms. Automatic updates have been implemented by at least a few sub-projects and are being held back mostly by the storage space problem. The hardware vendors are in the process of transitioning from NOR flash to NAND flash, so that problem will take care of itself over the next few years.
The risk of bricking a router is probably a lot lower than you think it is. With almost everything, it's truly hard to screw up to an extent that flashing over TFTP won't fix. A lot of mainstream hardware is significantly more robust that that; I have a bottom of the barrel D-Link that provides a web interface in its bootloader for rescue flashing.
Any open hardware device that is suitable for wireless router duty and fits within a $50 budget would have to be essentially a standardized PCB for a single-band Atheros ath9k SoC. It would provide almost no benefit over the dozens of commercial off the shelf products that use those chips and almost universally run OpenWRT flawlessly.
The complexity of installing on any random device is almost entirely with determining what exactly is inside that device, since basically every vendor routinely changes everything inside the product without changing the model number. OpenWRT already has the infrastructure that solves the version maintenance problem, since they do automated builds of the OS and packages for all the various supported hardware platforms. Automatic updates have been implemented by at least a few sub-projects and are being held back mostly by the storage space problem. The hardware vendors are in the process of transitioning from NOR flash to NAND flash, so that problem will take care of itself over the next few years.
The risk of bricking a router is probably a lot lower than you think it is. With almost everything, it's truly hard to screw up to an extent that flashing over TFTP won't fix. A lot of mainstream hardware is significantly more robust that that; I have a bottom of the barrel D-Link that provides a web interface in its bootloader for rescue flashing.