Did we miss any features you like? Did we skip over any breaking changes you found? Feel free to document them below.

• We've dropped v16 support. Some features may still work on node versions as old as v10, however official support is only for v18 and above.
• shell.sed('-i') will now return an empty .stdout value. This is consistent with how unix sed -i is silent when running in -i mode.

• shell.cmd() has arrived! This is the more secure alternative to shell.exec(). This only supports synchronous use cases for now, but we recommend you switch if possible.
• We've switched to fast-glob as the wildcard expansion implementation! This should mean a modest performance boost for all ShellJS commands.
• Better compatibility with node bundlers.
• Lots of fixes for unix compatibility.

https://github.com/shelljs/shelljs/releases/tag/v0.9.0