There's S.M.A.R.T. and a lot of freeware that can read it and tell you how much has been written to the disk. If only it were built into operating systems, wit

There's S.M.A.R.T. and a lot of freeware that can read it and tell you how much has been written to the disk. If only it were built into operating systems, with a graph, then you could set up warnings, like you can for overheating CPUs, etc.