Downtime
Downtime is perhaps the single greatest disadvantage of cloud computing. We’re not talking about server downtime, but your Internet access going down.
Security
“Hold on for a second,” you might be thinking. “Didn’t you just say security was an advantage of cloud computing?”
Security, at one level, is an advantage of cloud computing for the reasons discussed above. Security is also a disadvantage at a different level.
Cloud Service Closes Shop
In a mature industry, you usually deal with one of a handful of known players that offer time-tested, reliable services. Cloud computing is a young industry with lots of companies vying for business. There is a possibility that your cloud provider will run out of money and close their doors forever.