The point isn’t what you (MyPasswordSucks) would find objectionable, the point is what the median would find objectionable in a professional setting. Luckily we’ve gotten away from the locker room behavior being the median and now the median is approaching good-manners behavior. This is one of the situations where the Overton window shifting makes us better as a species instead of worse.

AES is only 3 years shy of 30.

If you used MD5 as a keystream generator I believe that would still be secure and that's 33 years old.

3DES is still pretty secure, isn't it? That's 44 years old.

As for today's data, there's always risk into the future but we've gotten better as making secure algorithms over time and avoiding quantum attacks seems to mostly be a matter of doubling key length. I'd worry more about plain old leaks.

The gold standard 30 years ago was PGP. RSA 1024 or 2048 for key exchange. IDEA symmetric cipher.

This combination is, as far as I am aware, still practically cryptographically secure. Though maybe not in another 10 or 20 years. (RSA 1024 is not that far from brute forcing with classical machines.)

You are underestimating the exponential possibilities of keys.

>plus general vulnerabilities and weaknesses discovered, will ensure that anything encrypted today is easily readable in the future.

You can't just assume that there is always going to be new vulnerabilities that cause it to be broken. It ignores that people have improved at designing secure cryptography over time.