I think it depends on when you look back from.
I think of WWI, the Inter-War period, and WWII as three separate periods of time and they cover about 40 years.
I think of The Louisiana Purchase (1803), the start of the Monroe Doctrine (1823), and the Mexican-American War (1846-1848) as all happening about the same time, despite covering about 45 years (before double checking just now, I could've sworn the Mexican-American War was in the 1830's, and that Monroe was president in ~1816, which only drives the point home more).
I doubt we'll feel the difference by 2100, but between 2200 and 2300 is when I expect that blending to happen.
Good.
I had a Nissan as a second car. It was near impossible to repair with resources locked behind paywalls and subscriptions. It was impossible to find repair manuals (which were treated nearly as religious texts growing up). I regretted how often I had to pay someone to double check my fixes were up to spec.
Replaced it with a newer Honda and love it. Despite being ~7 years newer, it is easier to fix and also performs better.
For all my economy car needs I intend to run Hondas going forward and was super fearful this merger would bring some if that Nissan repair philosophy to Honda. Glad its a dead deal.