New 'Doctor Who' TARDIS Has Reverted Back to an Earlier Version

It has a seriously retro look.

Why does the inside of the TARDIS change with every new Doctor? - Quora

Eleventh Doctor, Tardis

Is there a canon reason why the Doctor's TARDIS interior changes so drastically from classic to new Who? I'm talking about from how it goes from the small, classic roundels/white design to

TARDIS Doctor Who World

Is there an in-universe answer on why the TARDIS exterior changes? I know the original prop was used from the 1st Doctor era to the beginning of the 3rd Doctor era.

A Brief History of the Doctor's TARDIS

Why does the inside of the TARDIS change with every new Doctor? - Quora

Doctor Who: The TV Movie” (1996): Bridging the classic and modern eras… – Musings of a Middle-Aged Geek

Doctor Who 2023: What will the new TARDIS interior look like? - Lovarzi Blog

Doctor Who Review: Old faces and convoluted endings