I really think you're wrong on that. Most people here, myself included, have fond memories of playing on older versions of SRB2, 1.09.4 included. How could we not? That version was current for years. However, you'd be wrong saying that most people prefer the older version instead of just having fond memories of it.
It's a common fallacy to think that because you have an opinion and you talk to a bunch of other people that think similarly to you that the overall majority of people agree with you. You're experiencing what's called a sampling bias. As an example, let's say you're holding a poll on who's better, Mario or Sonic. If you go hold that poll on a Sonic forum, you're likely to get results that say that Sonic is better. If you hold that poll on a Mario forum, you're likely to get the exact opposite result. The poll is the same, but the people you're talking to are universally biased in the same direction because of where you're getting people to talk to. In order to get a fair, correct answer to which people overall like best, you need to talk to a random selection of people from the entire population, not just people on one side or the other.
Hence, I really don't suggest that you say that "most people preferred 1.X", because I highly doubt that's the case. It might be the case in the people you netgame with, but the feedback I've gotten is from a far wider cross-section of players, and 2.0.X is overwhelmingly considered to be an improvement over 1.X. I have no reason to believe that 2.1.X won't also be considered an improvement over 2.0.X when it releases.