I don't know for a fact that US did look at changing business models, which is why I said "supposedly".
The revenue again. The low-cost business model produces less revenue than the legacy model for comparable sized carriers. So if - IF - US did indeed consider changing the business model the idea wasn't rejected because it would have less reveue than it would have as a legacy model carrier. It was strictly the time required to make the transition versus the cash to keep operating while making the transition. Since US was already burning through cash, it was a relative easy calculation to make.
While it may be theoretically possible it requires a big enough cash cushion to make the change. None - NONE - of the "airline within an airline" experiments were attempts to morph into a low cost business model carrier. They were all attempts to have a competitor to the low-cost competition while maintaining the legacy business model for the majority of operations. It was the proverbial finger in the dike - hold low cost competition off while mostly retaining the legacy model.
Just a tip also. You should recognize by now that if you try to take a discussion personal, it only incentivizes me to prove that I am right. When it comes to discussions on the business of aviation, I speak what is true. I'm not an authority over other aspects of the airline industry and don't try to be but I do know the business of the airline industry.
Keep it cordial and we can debate whatever you want cordially.
The Whole Truth always comes out.
Now you are dreaming. WN's costs are lower (though not by much) than US' - the smallest of the legacy carriers by far. The other legacies - AA, DL and UA - have costs about double WN's, and are about the same size (plus/minus depending on the yardstick and specific legacy).
What you seem to see as a weakness of the low-cost model - lower revenue - is really it's strength when combined with it's lower costs (yes, revenue AND cost are important). The traditional low-cost carrier hasn't traditionally priced their product by what the traffic will bear like the legacies. Neither have they tried to be all things to all people, like the legacies. They price their product to cover costs and produce a reasonable profit, or attempt that as best as they can given the constant uncertainties they face. That allows them to charge reasonable fares, which produces traffic that allows them to grow.
Jim