So, the original Transformers toyline was simply named "Transformers" until it was cancelled in the USA in 1990 (and continued under that name in Europe and Japan for a few more years). Then comes "Transforners: Generation 2", and introduces us to line sub-titles. Next come Beast Wars, Beast Machines, RID, Armada and all that other stuff. Because Generation 2 was named "Generation 2", we now retroactively consider everything that came before that as "Generation 1". Now, if Hasbro had named G2 something else, such as "Transformers: Combat Heroes" or "Transformers: Ultraforce", how would we be looking at G1 today? Sure we wouldn't call it "Generation 1" because there's no "Generation 2". But would we still consider it as one singular toyline/franchise that lasted from 1984 to 1990/1993, or would we view it as a sequence of several revamps? There's already scattered factions in this fandom who only consider the pre-1986 movie toys to be the "true" G1, or only the "cartoon" era toys up until "Rebirth". Would we think of the 1980s/early 1990s line as "Transformers Original Series", "Transformers Headmasters Series", "Transformers: Pretenders", "Transformers: Micromasters" and "Transformers: Action Masters"? The 1989-1990 toys were pretty consistently divided into Pretenders, Micromasters and Action Masters, after all, with no new toys that didn't fit into one of the gimmick-based sub-lines.