If what you are saying is true, then, for me, 2e was FAR more important to me than 3e.
Um.....No.
First off, you misunderstand what is meant by "importance of system". If system is important to you, it makes sense that you try multiple systems in order to find the "best" one to your needs. If system is unimportant to you, there is no real incentive to try new systems.
IOW, if system is important, you invest in new editions, and probably new games as well. If system is unimportant, there is little incentive to do so.
Secondly, you misunderstand the relationship between purchases on various editions. If I had a choice between X and Y, and I spent ten times as much on X, it would be a strong indicator that X is more important to me than Y. If, OTOH, Y does not yet exist when I bought X, examining how much I spent on X only shows that X is important to me.
Third, you have heard the saying "Time is Money"? Now, look at the post you are replying to:
When I look at my RPG book collection, it is a certain indicator that I think system matters! Moreover, the time I have spent tinkering with system is the same.
Did you tinker with Star Frontiers, or did you use the system as written? Your answer is an indicator of how important system was to you at the time.
Finally, in your example, the guy who is happy with 1e may believe that system is important to him......and, if he has chosen 1e after an extensive examination/trial of other systems, I would accept this to be factual. Otherwise, I would believe that there are other factors involved.
What this thread demonstrates, to me, is that some of us
want to believe that system is unimportant to us, even if we have demonstrated in numerous other threads, as well as with our spending, that this is simply untrue.
RC