Yep, it's Murphy's law of online content. Anything you want to reference later will be gone, with no archive copies. Anything you want deleted will be available forever.

Interesting blog post comparing the culture and incentives of CEOs in different countries? Completely gone, tried to search it up multiple times to no avail. It's barely 3 years old.

That random 20 year old video of some middle schoolers doing a flying kick and breaking a vending machine? Yeah, just popped up on my feed yesterday.