In the short term, it would be good if people could organize legal aid for people in our field working under nondisparagement clauses. Some of these clauses may be prima facie difficult to enforce due to language; others may leave room to report companies to legal authorities.
Finally, and I'm a broken record on this: if a significant fraction of engineers at any company organized themselves and demanded reasonable limitations on their nondisparagement clauses, for instance to protect whistleblowing, they would get it. What's a significant fraction? At many companies, it's probably less than 20%.
I hope a lot of tech industry employees are, as we speak, talking with their friendly peers at their companies and starting to think about how to reach out to labor lawyers to start this process. It's not that hard, and, for the time being, federal law protects you extensively in the process of organizing your workplace.