I disagree. It's not about the culling, it has never been, and actually, it makes things worse. You spend countless hours and tons of money recruiting talented people not to lay them off because you don't want a bureaucratic org.
If the issue is inefficiency, tons of meetings, too much team alignment etc, then that's the issue that you need to tackle, and these issues can already appear in a 50-100 employee company. Sure, that's an easy problem to solve with a smaller size but unless you hired people for no reason, these people have a very specific set of problems to tackle and are often, in these companies, the best in class to tackle them, culling half of the company isn't going to make things better.
Google bloat gave us transformers. Apple bloat gave us a usable touchscreen only, pocket computer (famously an entire org within Apple had developed an iPod-based approach that was competing with what was released)
The leaps forward need bloat. A startup can execute on specific vector direction way better.
Now back to your point, what did X deliver with its lean ops? It seems that it needed 2 bailouts (one from xAI, and one from space X)
Google is competing with nvidia (TPU), AWS (GCP), Netflix (youtube), Tesla (waymo self driving), OpenAI (Gemini), Microsoft (Workspace), Apple (Android)....
If the issue is inefficiency, tons of meetings, too much team alignment etc, then that's the issue that you need to tackle, and these issues can already appear in a 50-100 employee company. Sure, that's an easy problem to solve with a smaller size but unless you hired people for no reason, these people have a very specific set of problems to tackle and are often, in these companies, the best in class to tackle them, culling half of the company isn't going to make things better.
(And X rehired part of the laid-off engineers)