In this case, the svn repos and samba shares are way over 100GB and even with classic HDDs, the machine can saturate the network and still be basically idling.

In this case, the svn repos and samba shares are way over 100GB and even with classic HDDs, the machine can saturate the network and still be basically idling. No need for SSDs, classic drives were more cost effective. The compression was just something nice to have. Lz4 in filesystem is basically for free.