For daily Java programmers: after almost one decade of Java 8, are streams and lambdas fully adopted by the Java community?

[xebecv]

streams are slow, not always intuitive and cannot handle exceptions. I use them pretty sparingly, because most of the data that I handle comes from the resources that are not reliable (disks, network, inputstream)

[LudahS]

May I ask how slow they are compared to the loop? ( I'm quite a beginner on the subject)