It's been a good market for workers. But everyone should beware that things are changing–or at least, employers are conspiring against workers to change them.
Please stand firm against burning yourself out to do 2 jobs for the salary of 1. Don't let them make their business decisions your problem, eat further into your life for no added compensation.
The Federal Reserve is openly pressuring corporations to freeze hiring. I've already seen posts or articles on LinkedIn confirming that many companies are starting to freeze or slow hiring. It's spreading everywhere.
Honor yourself, don't work harder for nothing. If they want to leave open positions vacant, they're not doing it at our expense!