Barely used for its many “complications”. We only tend to encrypt very specific and important files and/or email messages. Have you ever done it?
However, encryption is getting easier to implement and use, nowadays we can encrypt not only individual files, but also entire folders; and even external memory units (USB Flash Drives) and Hard Drives, both internal and external.
In fact, we do not need to acquire third party products for encrypting anymore; business editions of Windows 7 and the latest OSs and email programs offer it “out of the box”.
Some technologies implicitly offer encryption: wireless routers, VPN systems, email servers, and some more.
Encryption offers a very high level of security for data protection, the only caveat would be that we lose the key: then we are in deep trouble. However, the scale will always tip to the positive and many advantages of encrypting and therefore securing our data.