As for safety (the topic of this thread before we turned it into a travelogue), I haven’t been there since late-2019, but at least at that time downtown didn’t seem particularly dangerous, especially compared to places like Chicago or even Denver, where I live. Most of what I saw back then was just the typical liberal-caused deterioration. Lots of street people hanging around everywhere, but otherwise I felt relatively safe. I stayed at The W that time, for reference. Don’t know how events since then may have changed things, though.
Seattle city center has gone way down since you were there in 2019.
The riots came and then the abdication of laws just before the pandemic. It’s a ghost town now. Amazon moved a 2000 person office out and has announce further moves due to violence.
As for the flight museum, I was pleased to hear that the Flying Heritage Collection (Everett WA) was recently purchased from the Paul Allen estate by one of the Walton (WalMart) heirs. Unlike the museum at Boeing Field, all the planes are in flying condition. They expect to reopen later this year. Put it on your list for a future visit!