Except that wireless router manufacturers use ancient SDKs that are based on Linux kernels and tools that were typically 5+ years out of date as they were froze

Except that wireless router manufacturers use ancient SDKs that are based on Linux kernels and tools that were typically 5+ years out of date as they were frozen by the hardware designers early in silicon development. It took a long time for upstream tool updates to trickle all the way down the hardware development path and into shipping consumer gear. IPv6 support for an ISP was still really difficult in 2010 because of that despite the protocols being released in 2003. I know because I tested a bunch of consumer gear back then and working IPv6 support was still hit and miss. Things are far better today.