Boosting this because it bit me in an unexpected way - some of the new default rulesets are… interesting opinions.
Ruff 0.16.0 - Astral's fast Python linter - came out a few days ago and increased the number of default-enabled rules from 59 to 413, which highlighted all sorts of problems across my projects (1618 in sqlite-utils alone) https://simonwillison.net/2026/Jul/25/ruff/