Yes, but you have to think about contention. Whilst the Top of rack might have 2x400 gig links to the core, thats shared with the entire rack, and all the other

Yes, but you have to think about contention. Whilst the Top of rack might have 2x400 gig links to the core, thats shared with the entire rack, and all the other machines trying to shout at the core switching infra. Then stuff goes away, or route congested, etc, etc, etc.