Unfortunately I didn't see the recommendation there on what can be done for old papers. I checked, and only my papers after 2022 have an HTML version. I wish they'd make some kind of 'try html' button for those.

Do the older papers work via [Ar5iv](https://ar5iv.labs.arxiv.org/) ?

> View any arXiv article URL [in HTML] by changing the X to a 5

The line

> Sources upto the end of November 2025.

sounds to me like this is indeed intended for older articles.