"Thousands of scientists are cutting back on Twitter, seeding angst and uncertainty."
The #1 choice is Mastodon!
Let's reach out to all our scientist (and non-scientist) friends and acquaintances and encourage them to join the Fediverse. If you still have an account on twitter, post some messages there with links to the Mastodon signup site. Let's welcome them here and provide some gentle hints on how to be productive here.