“Fall by the wayside”

“For the time being”

For now; temporarily.

“Fall flat”

To fail to have the intended effect.

“Have the upper hand”

To have an advantage or control.

“Cross the line”

To behave in an unacceptable way.

“Lead the way”

To be the first or guide others.

“The ball is rolling”

Something has started and is now progressing.

“Fly under the radar”

To avoid attention or notice.

“Behind the times”

Old-fashioned or not modern.