Old behavior: "Next" would use the timestamp of the newest message as of when you last loaded the page. "Next" would take you to a page containing that timestamp and all newer-timestamp messages. For example, as I'm writing this, the newest message has timestamp 2025-07-10T14:03. "Next" used to take me to https://www.postgresql.org/list/pgsql-www/since/202507101403 and I'd then see the 14:03 message and later messages, if any.
(I'm simplifying; there are more behavior nuances if one starts at a date far enough in the past for messages to fill the page.)
Does anyone have background on this change? I found no discussion of it.
I liked the old behavior better, since it made the "Next" button convenient to see everything since I last caught up. That said, I'll adapt if the change is intentional and/or favored.
Yes. The problem with the old more detailed URLs is that in practice it generated an infinite number of URLs for AI bots to crawl, and they did. We got a constant load of a few hundred bot hits per second just looking at those indexes. Because AI is the future....