One feature I greatly appreciate is the new default output mode in the SQLite shell in interactive mode. It now defaults to qbox with reflow and line limits enabled, making a fairly pretty output on the terminal. It even does rounded corners. :-)

    sqlite> SELECT 'Hello, world!' AS Greeting, (1+sqrt(5))/2 AS Golden;
    ╭───────────────┬────────────────────╮
    │   Greeting    │       Golden       │
    ╞═══════════════╪════════════════════╡
    │ Hello, world! │ 1.6180339887498949 │
    ╰───────────────┴────────────────────╯

Fix for WAL bug, improved ALTER TABLE