[chrissmithuk]

MIPS is on the rise again as recent SoCs are more power efficient than ARM. I don't have a source for this unfortunately.

Sony Bravia EX series televisions are MIPS and Linux based for example.

[gonzo]

It's not power efficiency, it's money.

MIPS SoC licensing is less expensive than ARM licensing at the smaller volumes inherent in low-end routers (.vs phones and tablets).