Easier tracking of PEP changes, versions, or modification dates

Indeed - happy to say why, and thanks for the answers.
I’ve looked at a variety of PEPs over time, and was surprised to discover that there were changes which I had missed. I’m used to other standardization practices, which do track versions or timestamps, and I had no idea that PEPs were changing without any obvious visible indication other than reading the whole thing or following links. I assumed that Post-History was an indication of when the PEP changed, i.e. when it was posted to the web site.

I don’t want to have to follow links just to know if there have been changes recently. A Last-modified date is pretty common on web sites and seems like it would be a straightforward addition which would help engage people more effectively and productively.