Dragon Ball Was Supposed To End With The Cell Saga But Akira Toriyama Was Pressured To Continue, Editors Reveal - Animehunch
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Akira Toriyama originally intended to conclude Dragon Ball with the Cell saga, but strong editorial pressure forced him to extend the series, according to a

From the article:

Akira Toriyama originally intended to conclude Dragon Ball with the Cell saga, but strong editorial pressure forced him to extend the series, according to a recent interview with three former Dragon Ball editors: Kazuhiko Torishima, Yu Kondo, and Fuyuto Takeda.

This was revealed during a recent episode of KosoKoso podcast on Feb 22, 2025.