How important a computer backup could be for a individual client?

Last three days I was dealing with an old computer of a long-term client which has a quite impressive collection of music inside his computer and after running a few previous backups we decided that his computer will be replaced by something newer and faster. To find a newer computer was not a bigger issue but much bigger challenge was to backup a data from his old machine and transfer this data to a new environment. Music files were everywhere and in sometimes incompatible formats which did not give any chance to play them in one music player. From the surface it looks like a relatively short job but unfortunately the old hard drive refused to work for longer and the only source of data was imperfect backups created by Acronis. It took a few hours to make a certain order with this mess and therefore I love this job.