They would look the same really. The word size being 128 instead of 64 doesn’t really change anything about the architecture. It just means the proc’s registers are 128 bits in size, the system bus is 128, each RAM address and data is 128, etc. The only difference would be significantly more expensive to crunch ridiculously large numbers. So really not much benefit. I expect 64 to be the standard for quite a long time, maybe forever, because we have much bigger bottlenecks to worry about.

Big money through a contracting company? They take a cut, I’m sure. Still worth it?

Gut ecology is complex and everyone’s is different and it changes over time and with age and when you have to take antibiotics, etc. There’s no one sure-fire way to just eliminate it.