Those fighting controls to me is the biggest contribution SF has done for the genre. This game also made the music of the stages actually relevant
No one cared about the music of fighting games before this game and to this day SF2 has one of the most nostalgic soundtracks of any game.
On a personal note, i used to love the
Street fighter 2: Hyper championship edition Arcade machine but not the official one, the hacked one
The arcade machine i played was even faster and more broken than this one, i remember using Balrog to beat it cause his special punches also came with 2 hadoukens
That's all i have to say about SF2 but not about hacked arcade machines, the next game i'll be covering
Mortal Kombat also had a hacked arcade machine