I have a thick book and it's really not a problem. In fact, it's stiffer so there's less wear.

Having gotten my latest passport this year, I've come to the conclusion that it will be mostly blank due to the proliferation of countries that do not stamp. I don't usually go to countries that need a visa, though I have in the past.

To start a list, the following countries that I visit or might visit often do not stamp:
Canada
USA
Singapore
Australia
UK
EU (probably starting April 2026)

Countries that do stamp:
Japan
Taiwan