That's one problem. 25 years is also a really long time in fast moving fields like software, microchips, etc. And the format the invention is "published" as is

That's one problem. 25 years is also a really long time in fast moving fields like software, microchips, etc. And the format the invention is "published" as is essentially a legal document, often largely written by lawyers for a target audience of patent clerks and other lawyers, not a technical specification written for engineers and scientists. And the is an incentive to omit or obscure details important to actually replicating the invention.