Which do you prefer and why for HDD or SDD hard disks ? And how is Ext4 with power failures nowadays ? iirc a few years ago there were issues with Ext3 (Yes, Ext3) and I remember a no barrier option was needed ? Is Ext4 much better ? And what FS do you prefer on usb storage ?
wasn’t exfat support included some time ago into the kernel?
Yes, it was added into Linux Kernel 5.4 in November 2019 after Microsoft open-sourced exFAT [quick context overview].