About the golf-bag, I haven't seen it either. But with the increasing cost of magic weapons it is possible to happen at lower level:
a +2 costs as much as four +1
a +3 costs slightly more than two +2
a +4 costs slightly less than two +3 or one +3 and two +2
a +5 costs as much as one +4 and one +3
higher eq bonuses make it progressively a worse idea to swap for lesser weapons. However IMXP a character always looks for one single top weapon rather than more lesser ones, unless he's a 2WFer in which case it's usually seen as frustration not to have weapons as good as the other PCs.
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Anyway, even if I definitely prefer the 3.5 DR, I agree with Monte Cook that the one bad effect of it is that the straight enhancement bonuses are not worth their cost anymore, at least compared to the special abilities. They are still useful (for the fact that there is an attack bonus besides the damage bonus, you may not just need the latter), but more expensive than before.
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IMO the DR is nice if it has an effect on the battle. Now I think we are too much thinking of a one-on-one battle, one PC with a magic weapon against a monster with DR. In this case the golf-bag would seem a very common choice, since without the weapon you may be seriously screwed up (even with PA or whatever damage bonus you have, DR is STILL giving the monster a huge discount on damage). In a 3.0 one-on-one battle DR had the exactly opposite effect: better have one weapon only ALWAYS, the best you can get.
But in 99% of the games there's a party of PC against the monster, and DR has a different impact...
In 3.0 when you face the monster probably some but not all the PC have enough enhancement bonus on weapons to beat the DR. This means that depending on HOW MANY in the party can bypass it, the battle can be more or less difficult. After a point however everyone has the right weapons, and DR doesn't matter anymore, or "saturates". Obviously at this point the DM gives you monsters with better DR and the thing restarts
In 3.0 the same thing happens with DR /magic, and ends being important pretty soon. The material-based DR instead is so that at every level it may be more or less dramatic, depending on how many PC have the right material. Since you cannot have more than one material on the same weapon, there's no saturation (ok, you could ALL have silver weapons, but then you won't have the other ones), and DR is always important. The only way to always have ALL the right weapon is to carry the golf-bag, which is otherwise rather suboptimal as I said before about the cost.
This more of less to say that I didn't dislike how it worked in 3.0, as long as the DM used monsters of a DR well-centered on the group. I just think the 3.5 is more flavorful* and less frustrating for the damage discounted is much lower at the same time.
*rather because you actually may have one more choice to deal with