Re: Oh no
> Also astonishing that a completely modern TeX can format a document written in 1982.
In principle, yes, but if the document relies on macro packages (almost all do, LaTeX being the most popular package), you better have compatible versions of these. I have often come across situations, sometimes with my own documents, where a new versions of TeX + LaTeX cannot handle an old document without tweaks, thanks to changes in the macros.