I can see that firing half the personnel, would stop cold any new projects. But continuing a stable website, that has been online for many years, should be doable with 3250 people (half of the 7500 people employed by Twitter).
I have no doubt, that Mr. Musk will start new development--and hire staff to do it--when things are stable again.
I'm the guy in charge of the backup diesel generators, but I got laid off.
I'm the guy in charge of keeping kay dee prawn off twitter, but I got laid off.
I'm the guy in charge of keeping the COBRA payments current, but I got laid off.
I'm the guy in charge of overdue accounts receivable, but I got laid off.
I'm the guy in charge of keeping legionaires disease out of the HVAC, but I got laid off.
I'm the guy preventing HIPPA violations, but I got laid off.
I'm the guy doing anti-stalking enforcement, but I got laid off.
I'm the guy swapping out failed drives in a data center, but I got laid off.
I'm the guy doing test cases for the new version of android, but I got laid off.
I'm the guy in charge of giving EM accurate business intelligence, but I got laid off.
I'm the guy in charge of blowing smoke up EMs ass, got promoted.