I want it, in the same way I want a laptop with Linux. I can install it myself, and I already have done, but I wish the option was viable for most others, so that more of the market is open source.

For routers, the only realistic way that can happen is by getting some big vendor to adopt ddwrt or openwrt to offload (some of) the job of writing the firmware. And even then, most people use their ISP provided router. A niche vendor supplying preflashed routers isn't going to make a dent.