Aside from those guys that need a visa, the rest I doubt would want to touch Twitter for the same reasons that 75% want to leave. Firstly the market is still hiring, alot. Secondly, Musk's offering is not compelling at all. He wants to create a start-up, up-against-the-world mentality for a company that isn't a start-up. It's different, how...
Well first, he needs a helluva lot of engineers to run existing systems. So unlike a start-up there's no blank page for incoming talent, just shit tons of support on little to no handover. Secondly, unlike a start-up again, engineers won't have much sway like he claims and they know it. They have a sociopath at the top who will make random ad-hoc decisions (like twitter blue) and will shit on them publicly when shit doesn't work. Finally start-ups hire good talent and work them very hard, but they offer shares and the potential upside that if the company makes it they will become rich themselves. Without that potential upside, why would you go and work really long and hard? Just to make Elon rich?
And he plans to make everyone go to the office 5 days a week. Good luck with that. Most engineers would happily take a pay cut to work at a stress free environment that allows them to work remotely. The only ones who will buy into that vision are people who are at the beginning of their career. Who might not be the best fit to work for Twitter in the first place.
