Advantage gas surface burners - faster warmup for pots or pans on the
surface. I prefer a gas cooktop. Also, when electric power is lost,
the gas cooktop still works though the electronic ignition may not.

Advantage electric ovens - less heat released into the kitchen since
the heat is generated within the insulated cooking space rather than
externally applied.

Advantage electric griddles and large cooking surfaces - more even
heat with fewer hot spots.

I would not buy a standalone, all-gas stove.