I'm feeling the same. Two of my teammates are in Ukraine right now. Bosses are now talking about hiring new people to keep up with the workload. And this is the same meeting where my boss said we have a lot of work, but nothing critical. All the systems are running fine, no major bugs recently, the work is purely adding new features.
And they're ready to replace them after ~4 days. It just makes me think we are all absolutely expandable. Hopefully no major crisis happens in my life, cos they'll drop me in a heartbeat :(
Succession planning. Disaster recovery planning. We should have these.
Not having them can lead to hasty, unwise decisions. They should include prioritising tasks and cascades/durations of fall over.
There's not necessarily reason they mean dropping anyone either. Even if exclusively looking at a financial impact there are costs of switching, costs that might be low for a server needing restoring to high for acquiring knowledge specific to your field or product, or a whole lot in between, for example.
Just have a plan. If you don't, be aware of potential for flawed decisions made in haste.