I don't disagree with much of anything I've read here, but I also feel that people have tended to wad history up and throw it away every time the next new thing comes along. Preservation of the technology which got us to where we are is important too. I work with a lot of younger people who think they're smarter than all the older people because they can tweet and morph photos of their friends into vampires and clowns with an "app," without recognizing that these "old people" pioneered the general and common use of computers, when none of it was that easy.
Technology and advancement is all well and good - and I'm happy to take advantage of it, but the vast majority of the computing power in just a phone these days isn't used by or for the benefit of the USER. It is under-utilized and mis-utilized. Cast bullets aren't putting food on my table, saving sick babies or keeping despots at bay. I don't see anything wrong with drawing a line at some historical point to enhance the challenge - to see if we can better our forebears, using what they had to work with. I may be WAY off base, but I've always seen the CBA as similar to the NMLRA.
Once popular BPCR silhouette shooting and cowboy-action shooting seemed to have similar rules which set limits - challenges - to do something with less gear, technology and money, but I'm sure they did eventually evolve to where scheming to win was more important to some people than the spirit of the endeavor. A museum curator is not simply "stuck in the past" or "resistant to change."
Again, I'm not a member, being more like what
@Spindrift describes as his own philosophy on competition, so "my vote" doesn't count, but in a more general way, I prefer to see the preservation of history and challenging ourselves to work within the confines of a certain level. I personally take great pride in being able to start a fire with a bow drill, but I don't carry a bow drill in my kits - I carry stuff that will make a fire under the worst of conditions, which involved technology.
Not being a competitive person, I will obviously not be able to appreciate the objective of winning. Advancement is fine too, but I also believe there is a lot of benefit in challenging ourselves with limitations, especially as it applies to maintaining a clear view of how we got to where we are.