I don't go on that kind of site, but I saw this post here. So my question is should she join some other instance of Bluesky that isn't Bsk.social so it won't crash?

Even if it is short crashes, I want her to have a good experience with decentralized networks and not go back to Xshitter.

[–] Emperor 1 points 4 days ago

So my question is should she join some other instance of Bluesky that isn’t Bsk.social so it won’t crash?

There aren't any, hence the meme.

I want her to have a good experience with decentralized networks

It is only notionally decentralised, she should just consider it as Xitter without the people actively trying to burn the world down with us still on it.

See also: Bluesky's fedi-washing and some context for that.

On the upside, it was fairly brief while they did an update, which is what all websites have to do from time to time, including a lot of Lemmy instances with the new version out. So it shouldn't spoil her user experience.