Here’s Elmgrovegnome...
Think what it will take for that too happen. If the Niners land Watson it will cost more than what Stafford just did. Plus they have no viable QB to trade, for Houston to fall back on. The Niners will have to bid against teams with better future draft picks, consider it was more so the injuries that did the Niners in and its not likely they miss the playoffs otherwise.
Everything I've read was that Shanahan wanted Stafford. Shefty just said on ESPN that McVay has been studying Stafford for a few weeks and he is the QB that he really wanted and feels that Stafford will allow them to do more to open up the offense than Goff did.
So, if true then McVay felt that Stafford was the best fit, which likely means that Shanahan did too since they run the same offense.