People underestimate how fast the Government moves when there is consensus. The issue with Americans is that we have rarely any true concensus.
I definitely feel bad for the career civil servants and fear for the loss of their expertise. It will take decades before indiviuals can replicate their job at any level of efficiency. But Government could hire more workers to do the jobs of the old experts, or maybe hire them back or even contract to them as consultants (at grossly worse prices but I don't think any of these experts are dead. Just distrustful and maybe a bit vengeful about the loss of their work environments).
Nothing going on here is permanent loss. Its 'only' a gross level of inefficiency and waste. But if we all agree that 2024 was a better year than 2025, it isn't a big deal to rebuild to the status quo.
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What is truly gone is out soft power across the world. Europe won't have a damn reason to trust us for decades.