If we started from scratch, all the automation we have would take months to build so cloud might be cost effective for first few years. But with automation alr

If we started from scratch, all the automation we have would take months to build so cloud might be cost effective for first few years. But with automation already in place cost to both maintain that and that once-a-month visit to replace a hard disk in datacenter, or once-a year half-day to install few servers is far cheaper than anything cloud, especially if you need bandwidth