For me, sit drag for early / hot season and fleece for every other time. A good alpine harness with added LB loops is less than a pound. Fleece with accessory cord bridge in sheet bend knots to fleece configuration, the weight is insignificant. Unadorned sit drag with amsteel blue bridge, the weight is insignificant.
For me, it is not a decision based on lack of funds (I have spent way more on clothes/packs/platforms/gear/hunting weapons). It is just the simplicity and ease of use and easy replacement (fleece or sit drag) when it ends useful life, and comfort (I am looking at you WalMart Fleece!) that is the draw for me.
I hunted out of legacy trophyline saddles with legacy Stepps as platform (lone wolf sticks or Stepps for ascending) for years.
Sold the legacy trophyline, switched to sit drag and fleece, and recently purchased the ridge runner platform. I have purchased, and returned, commercial saddles. I want to like them, but their use is not compelling to me.