Cool small features in Emacs 30 that I really like:

• If you have ever tried to create a custom modeline, you may have discovered that right-aligning elements was a massive pain. Emacs 30 adds a new modeline element mode-line-format-right-align which makes all subsequent elements in mode-line-format right-aligned.
• When Emacs prompts you about recovering an auto-save file, you can now press = to show a diff between the buffer and auto-save. No more guessing whether you had done anything important.
• E in dired opens a file with the default program for that file type (via xdg-open or OS equivalent).

One small thing I liked in the new version is the grep-use-headings user option, if you set it to t, then grep buffer lists the search results with headings, one per file, instead of repeating the filename every single time.

emacs for android saved my life. thank you, po lu