@Grujah, sure, though the native village effectively acts as a massive +draw at some point.
@WW, I get that bridge is better if and only if you use the extra buys, however in what circumstances (minus the already mentioned ones) is that difference enough to make me buy bridge. in general, I only buy woodcutters if I have a major engine in play, with no +draw, this engine is unlikely to materialize.
@werethegreat if you want even more cheap cards sure, bridge already gives you a +buy though so it's much less of a deal than, say, highway.
@jomini, This is what I was looking for, alt-vp games and other cost reducers can make bridge worthwhile.
To clarify, the general question I want to know, is when is bridge worthwhile when the game does not have a draw engine and when is it a trap.