In the original GI Joe lines, things were much different.
There was a two-three year gap between each new SS and SE figures in order for each new figure to catch on with fans. And in the case of a lot of characters, they never once received a re-released (IE Baroness) until the line was revived as a nostalgia based line in the late 1990s.
This is a major thing, especially when you consider all of the major characters STILL not accounted for in the 25th Anniversary line. No Mindbender, No Zap, No Cover Girl, No Zarana, No Cross-Country. This is a major league thing.