Reliability also depends strongly on current density and applied voltage, even more perhaps than on thermal density itself. So "slowing down" your average GPU use in a long-term sustainable way ought to improve those reliability figures via multiple mechanisms. Jetsons are great for very small-scale self-contained tasks (including on a performance-per-watt basis) but their limits are just as obvious, especially with the recently announced advances wrt. clustering the big server GPUs on a rack- and perhaps multi-rack level.