“The prevalence of chairs in most every humanoid culture could perhaps be attributed, in some portion, to Hodgkin’s Law of Parallel Planetary Development. On 892-IV, a society identical to 20th century Earth had developed (albeit where the Roman Empire never fell) with this parallel world including such common Earth furniture items as lamps, chairs, and tables. (TOS: “Bread and Circuses”)”—Memory Alpha’s entry on Chairs.
As you mention Transparent Aluminum- just this weekend, I got to wondering if they have it in the new, alternate timeline. The future of this one, they might not have to have traveled back to the 20th century to drop the formula. Sure, that happened before the diversion, but the diversion itself negated the incident. Unless, it was always going to be invented and just happened later. THOUGHTS?