probably a bit of both - depends on your objective. For a recreational rider who is not afraid to experiemnt, you can make incremental tweaks to saddle (height, fore and aft, tilt) cleats (fore and aft, side to side, angle) bars (height, angle) and stem (length, angle), and get dialed in so the ride is pretty comfortable, especially if you have a buddy to point out the obvious about your posture on the bike that you can't see yourself. If you're trying to optimize every last erg of power, don't ask me.