The Samsung S5 was very thin. Too thin imo. And it had a replaceable battery
I'm not sure about too thin (although I switched to the qi-charging back after a year), the replacements /where/ thinner.. but lost the IR blaster, replaceable battery, eventually μSD housing, eventually headphone jack.
My grandma is still daily driving my ancient Galaxy S5 Neo. When someone says thinness is opposed to removable battery, or water resistance, or headphone jack, or durability, or SD card... I always think of it.