As an American, the Nintendo callcenter and Gay Blade parts were new to me as well, and I lived through most of the time period of the series.
I think Doom made sense to end on. It was really the first modern 3D FPS. Plus, in the mid-90's (when it was released) there was an explosion of gaming. It would be hard to summarize the period after the mid-90's to today (look how much they had to cut out during the comparatively quiet 70s and 80s.
It makes sense in retrospect, I just wasn't expecting it to suddenly stop when it did (I was paying no attention to number of episodes).
Though every year in the mid-90s was indeed a huge step forward so it'd be tough to cover everything that happened.
It's a bit funny to me they didn't drop the term 'Doom clone' in there before going straight for FPS. That term hung around for years as a testament to its influence.
I think Doom made sense to end on. It was really the first modern 3D FPS. Plus, in the mid-90's (when it was released) there was an explosion of gaming. It would be hard to summarize the period after the mid-90's to today (look how much they had to cut out during the comparatively quiet 70s and 80s.