The program for this convention was very slim pickings anyway... Netflix is the only big company presenting (of course). I'm saddened how cloud providers have given no love to BSD.
For me, I like understanding what's going on under the hood. OS's like FreeBSD are very straightforward. When I use even a carrier-grade Linux distro, I'm more detached to the internals and entrusting my setup more to some other party. You lose compatibility for more stability.
Why? I have managed around 100 linux servers for the last two years and systemd has always been extremely helpful and never caused an issue. At this point there is no real competitive alternative in terms of features or cohesiveness.
I have direct connections who will be incredibly negatively impacted by the financial repercussions of all the lost business opportunities if NAB weren't to happen. Broadcast Media is contracting at best, and this won't help.
I'm not saying it won't be the right call, but it will have rippling effects beyond mere inconvenience.
It would be an acceptable reason for cancellation coverage with a lot of travel insurance (ymmv, but I know of less-logical reasons for cancellation that were covered).