You should do the move. Sysadmin is now a niche discipline, people work in devops now. The tech economy is good and their skills are getting more obsolete. J

You should do the move. Sysadmin is now a niche discipline, people work in devops now. The tech economy is good and their skills are getting more obsolete. Just start slowly migrating things, and train them in devops skills. Then, even if you have a reduction in a year, they will have a year worth of modern skills in EC2 devops and the like. It's going to happen, so better it happens now than in the future.