The conservative choice
ext4 is what you choose when you want the filesystem to disappear into the background. It is mature, widely supported, familiar to rescue tools, and rarely surprising.
- Great for: laptops, desktops, VPS instances, simple servers, dual-boot setups.
- Why people keep picking it: it is boring in the best possible way.
- What you give up: snapshots, transparent compression, send/receive, and more advanced integrity features.