be locked in a time warp

To remain unchanged from a time in the past, especially in an antiquated or obsolete way. ("Time warp" is sometimes hyphenated.) This town is so entrenched in its backwards ideals and moral values, like it's locked in a time warp or something! There's nothing digital in the house—no computers, no smartphones, just a typewriter and a single rotary telephone. Talk about being locked in a time-warp!