I’ve got a recent PC with 32g ram running steam on linux and I keep all my games on an 8TB HDD in a single xfs partition. OS is on a 1TB SSD. With ext4 and zfs I ran into stuttering and slow loads and installs. With xfs no stuttering at all when assets are loading. Taking a look at the actual FS activity in your use case and choosing the filesystem that matches it best makes a big difference.