65.0X Optical Zoom
65.0X Optical Zoom of Canon SX70 HS 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,Canon SX70 HSis a good compromise between size and functionality.
Carrying this weight all day may not be very comfortable for you. Body Thickness 117mm
With a thickness of 117mm,Canon SX70 HS is not a pocketable camera for sure. Small 1/2.3 sensor
Canon SX70 HS's small sensor struggles in low light situations compared to larger sensor.