When does a weak bishop stop being weak?
The concept of good and bad bishop has always confused me. I can appreciate the difference in some contexts, but I genuinely don't feel like the so-called bad bishop is truly worse than the good bishop in every situation or even most openings.
I play variations of the Stonewall, which is about as obvious as it gets with my black bishop being worse. However, in many other openings, what I notice is: 1) the good bishop has good mobility on my side of the board but is locked out from having any impact until middle or end game if the position is closed, because it's just pointing at enemy pawn chains. 2) My bad bishop has more mobility on their side of the board, so in closed positions, if it's outside my own chain, then it faces enemy minor pieces. While it's hard to establish a good stable post with a bad bishop in the opening, isn't it way more "active" or "attacking" than the good bishop? Maybe one thing I'm missing is, how should I try to improve the value of my good bishop if its just facing pawn chains?
Another thing that confuses me: in the middle game, I can render the enemy "good bishop" by locking them out with long pawn chains, but as I transition to the end game, should I advance my pawn chains to be on the opposite color? It feels like, same color is great if I can block the bishop from attacking any chain, but the moment enemy bishop can harass my prawns, it can be a disaster. And yet, if I advance my pawn chains to opposite color too quickly, I'm allowing their good bishop to have significant mobility and scope against my minor pieces that it otherwise wouldn't have. So what's the principle here about reducing the value of enemy good bishop?