I don't know how you would measure it, though I would assume that there is no particular reason for the people who use the language or their preferences to change? A quick search brought up that they apparently renamed their master branch to "main" very recently (https://blog.rust-lang.org/inside-rust/2025/10/16/renaming-t...) (context: https://sfconservancy.org/news/2020/jun/23/gitbranchname/), to the point I was more surprised that it hadn't already happened earlier.

The general temperature of politics in FOSS, I think, is not obviously lower than before: just in terms of things that made it onto HN, in the past month or so alone we have seen the aforementioned kerfuffle about dhh (the leader? founder? of Ruby on Rails), his projects and their detractors, and the wrestling over control between NixOS's board and its community moderators who were known for prosecuting political purges and wanted to assert formal authority over the former.