In 2025, this feels like the most underrated quality-of-life improvement. It supports bracketed paste mode, syntax highlighting, and better history management. It no longer feels like you need to install ipython or ptpython immediately after a fresh install just to have a usable interactive session.
: The copy-and-patch Just-in-Time (JIT) compiler has undergone a year of testing, offering significant speedups for computationally heavy tasks. python 3.13 release november 2025
# No special import needed; check if enabled import sys print(sys.flags.jit_enabled) # True if built with --enable-experimental-jit In 2025, this feels like the most underrated