Fascinating. For some interesting US history on the topic, see: https://www.fhwa.dot.gov/infrastructure/right.cfm

In particular I found this interesting: "[...] most American cars produced before 1910 were made with right-side driver seating, although intended for right-side driving [mirroring how horse-drawn carriages had been set up]. Such vehicles remained in common use until 1915, and the 1908 Model T was the first of Ford's cars to feature a left-side driving position."