OK, time to inject a bit of logic to this. The aircraft mentioned above that have used reverse in taxi tend to have clamshell reversers and all of the flow is directed by them.
However, aircraft with high bypass engines and sleeved reversers only use the fan air to create a wall of air that causes the drag to slow you. It's less the forward momentum of the air than the large area of disturbed air that acts like a parachute effect.
At idle, the majority of thrust you are getting out the back is the core. SO reverse idle is providing f**t in a spacesuit type usefulness in this case. If you need reverse you need to give it a HANDFUL to do much.
Better to brake to a near standstill and taxi slowly. The friction of braking or riding the brakes is far greater at higher speeds, so controlling the aircraft down a slope is going to generate a lot less heat at walking pace than 25kts.
Also this gives you more time to get to the single engine taxi point and makes for a smoother and quieter taxi in. Just my 20c worth...