Surprise to learn as not noted over there that pdp-8, z80 and 68000 all have similar arrangement, i.e. it has less code size for accessing the zero page or its

Surprise to learn as not noted over there that pdp-8, z80 and 68000 all have similar arrangement, i.e. it has less code size for accessing the zero page or its equivalent. Is that widely used over these? Not talk as much as zero page when learning retro computing.