Framesets

What it was

Frames let one part of the page stay fixed while another changed, often producing nested scrollbars and strange URLs.

Why people remember it

• They solved navigation before better layout patterns matured.
• They also broke linking, bookmarking, and sanity.
• Frames are a fossil of early interface experimentation.

What replaced it

Usually a platform feature, a private analytics dashboard, a cleaner app pattern, or a feed. The behavior rarely disappears; it gets renamed and absorbed.