I agree that it isn't wise to ignore small issues and let them grow into larger issues. That applies here to NJ. The answer is still the same though. If WB thinks the problem will spread he would jettison NJ without a second thought. And the impact on BH financials would be negligible.
While Goldman Sachs has the capital, as does GE, which Gunfyter mentioned, neither of these companies comes close to the reputation and cachet that WB brings to the table. It's also worth noting that both of those companies came to WB for capital infusions at the height of the financial crisis in 2008.
I can not think of any buyer that would measure up to WB in terms of recognition and respect within the owner base. If NJ were to be sold (which I think is a very remote possibility), then you can expect to see many owners reconsider their decision to use NJ.
Now that is a scenario I'd love to see, although I think that is extremely remote. NJ needs a leader who is passionate about aviation, cares about the employees, and has strategic vision. JH strikes out on all three counts.
He had a chance, he could have been a Herb Kelleher, (who is also a lawyer) but he chose to take the path of his stupid text books from law school that have been the same path that tore this country apart!!