I'd bet that's actually a part of what is restricting general demand for 1gbit+ NICs on consumer gear. How many consumer or prosumer applications actually exist

I'd bet that's actually a part of what is restricting general demand for 1gbit+ NICs on consumer gear. How many consumer or prosumer applications actually exist where 1gbit/sec isn't sufficient, but a pair of bonded 1gbit/sec NICs still isn't enough? Link aggregation is commonly enough supported and easy enough to configure for the kind of audience who needs it that I suspect this covers much of the demand which might otherwise be served by 5gbit or 10gbit NICs natively.