Many people today remember when DES (circa 1975) was also almost impossible to crack. Today, you can crack DES with a low-tier smartphone in a couple seconds.

Assuming we continue to amass computation like we have from 1975-present, it could only be a matter of decades before SHA-256 is also trivial to crack.

Not saying anyone should worry about it now. But also, don't be surprised if you find yourself worrying about it in 50+ years either.