thats all the power it can handle? ouch
Let's be serious. Shimano designed it as a high-end city-bike hub. They were never shy about saying that it shouldn't be used for a mountain bike/performance road bike. Most IGHs are not made with that kind of torque in mind, even when used on cargo vehicles where you are moving heavy 400+ pound loads. You'd have to try awfully hard to get more than a couple hundred pounds of torque into a cargo trike, for instance. The 11 is a weird hub, anyway, since it doesn't actually have a direct drive gear in it (NB: it actually drives the hubshell with rollers, not pawls, which is how they got the coasting drag so low).
That said, constant and peak torque are two different things. If you aren't capable of making your 9t skip on command, I wouldn't worry about it
All that said, the warranty rate on their 8/11 speed hubs is next to zero outside of seal failure/operator error (I'm including bad setup here). If a hub fails QC, it goes back through the line to be fixed, rather than thrown out. I'm told by the internal (hah) people that the IGH division is the reward for the engineers working there for a long time.