10.7X Optical Zoom 10.7X Optical Zoom of Olympus 1s will give you a lot of flexibility considering this will be your only camera during the day.
RAW shooting capability RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.
Medium size Body With relatively smaller body compared to DSLRs and better ergonomics compared to Compacts,Olympus 1sis a good compromise between size and functionality.
402g Carrying this weight all day may not be very comfortable for you.
Body Thickness 57mm With a thickness of 57mm,Olympus 1s is not a pocketable camera for sure.
Small 1/1.7" (7.44 x 5.58 mm) sensor Olympus 1s's small sensor struggles in low light situations compared to larger sensor.