People are constantly finding new things. For example Ross figured out the CC glitch (inf combo mob that counters.) a little over a year and a half ago / 2 years ago, and very few people in BC know about this currently due to Ross sharing it to a few select people.
Also S_A, was apparently the best at his time, however things change, and new things are found. Just to note stop fighting over if S_A is better or not. We don't know how good he could be at this time, your comparing the people of 2012 / 2013 soon vs someone who is from 07 / 08. If S_A kept playing or if S_A started playing again he may be better than he was / become better than he was. No one can say if they are better than him or not during this time.