15-20 years back, I would bring either 1.5 or 1.6 crop DSLR.
About 10-15 years back, I would bring different cameras for different types of holiday.
For photography holidays I would bring full frame cameras with zoom lens.
For normal holidays I would bring m4/3 with a 24-400 equivalent zoom.
For short casual holiday, a 1-inch sensor, G7X or G7XII or Sony
Nowadays
For normal holidays I would still bring a m4/3 to get a shot in less than a second with perpetual standby
For short casual holidays, mobile phone.