There are cases where this makes a big difference.

For a dramatic example, consider the VESA framebuffer console, a slow serial link, or a bad SSH connection with a good CPU on the other end.

With enough terminal output it will bottleneck whatever you're doing. Sometimes extremely dramatically so. To the point of adding hours to a task in really bad cases.

For such situations, it often helps a lot to run remote tasks in something like screen and only switch to it to check progress once in a while.