The rule is there for a reason -- but SPC-1 has been broken
The rule which demands that the UPS be there in this particular circumstance is there for a reason -- to ensure that what's being measured as a storage system in fact exhibits durability of writes. Otherwise someone could spin up a stateless AWS instance, run memcached-like software in it knowing that the data would be lost if the instance ever crashed or was reset, and claim a storage benchmark result.
I haven't been in the storage performance game for 14 years, or even in the storage business for 8 years. So take this with a grain of salt. But what we used to say is that the life cycle of a benchmark started with small numbers, grew to medium numbers as people learned to design and tune for the benchmark, and that at some point someone figured out how to "break" the benchmark turning in very large numbers which were no longer meaningful to the real-world customer use the benchmark intends to represent. Once broken, a benchmark needs to retire and/or be replaced.
On the surface, without doing deep study, the result in question tells me SPC-1 has been broken for large storage systems.
(speaking for self, not for employer, which happens to be HPE)