I read your reference and at no point they say that you NEED more than the usual dimensions… It merely talk about THEORIES that do it.
((OOC: personally I use the EvE Source book as data about stargates and in there, all what is explained fit into the 4 classic dimensions that’s what I used in my “thesis” part 2/ B) ))
For the same reason that probes are destroyed, because the gravitational waves present in the maelstrom (AD) are too powerful to keep anything in good enough state to be salvaged.
Only the bio cache do it, and because it’s entirely made of those batteries that are adapted to such gravitational pressure.
That seem unlikely since they use the filament tech like us and OUR bodies stay in AD. Why other’s would act differently?
That would be interesting, and we reached the same conclusion about time on the topic about their culture.