When you say "figures", do you mean that's what the evidence shows? If so, presumably twitter's automatic switching from chrono to algo is a significant factor.

I think OP meant “it figures,” as in “that’s not surprising.” But regarding figures as in statistics and usage, I have only anecdata but it seems Twitter recently is respecting the user selection for a longer period.

I've also noticed the longer period, but I assumed that was based on me having manually selected it so many times rather than being a global setting.

Algorithmic makes no sense to me. Imagine being in a group chat with friends where an algorithm decides which messages you can see and the way the messages are sorted. It would be absolute nonsense.