I will mention here that I've worked for two (at the time) Fortune 50 companies which went on major, almost ridiculous building programs.
One in particular realized they didn't have enough room to house all of their employees plus all of the new employees that they were going to need in the next 20 years. This was true - we were horribly understaffed and people were working out of broom closets and meeting rooms. This was also right before the "work from home" movement, so it was a big problem. Things were going great financially, so the money spent looked like a wise move. We were a Wall Street darling at the time, couldn't do anything wrong.
Vast tracts of land were purchased.
Several very very large buildings were constructed - a couple would compare to Apple's new campus in size (but not shape).
Then, fairly rapidly - but still over the course of a few years - the company made some mis-steps and internal bad decision-making (or lack of making decisions) was exposed. The public and Wall Street went from backers to detractors. The stock price plunged, market share dwindled.
Those buildings that were built? I can't think of a single one still standing or used by the company. They were either sold off, abandoned or simply leveled as they couldn't be sold (management built a few of these monuments in the middle of nowhere. Funny thing, people don't want to commute 90 minutes each way...).
Overall the number of employees went from a (brief) high of 175,000 to around 8500 today.
Now, I don't think Apple's management is on the same level as that company - but there are parallels here which probably have people a bit nervous.