In System Settings → Keyboard → Shortcuts → Custom you can now choose from a list of installed apps and their actions—in addition to being able to execute custom commands. This makes it super straightforward to add a keyboard shortcut for your most common workflows like composing a new email or adding a new Calendar event. Plus System Settings will also now warn you if your desired keyboard shortcut conflicts with a common system shortcut like "Copy", "Paste", or "New Tab"
For the first time we now also offer ARM64 builds for devices that boot with UEFI. This means you'll be able to run OS 8.1 on M-series Apple Silicon and devices where you can load UEFI-supporting firmware like Raspberry Pi. This version of Linux also supports certain Qualcomm and Rockchip processors, for example