In the early days of cordless tools it was pretty simple, now, not so much.
In a shop corded rules.
If you're working a job site without power (yet) then the cordless is pretty much the option (generators bring their own set of issues).
If you have integrated your cordless tools with your emergency preparedness plan, then it gets even more complicated. The accessories available now that use cordless tool batteries for emergencies are many and varied; radios, USB power ports, 110 inverters, flashlights, etc. The one I want isn't available, yet; a plug and play 6 port charger with integrated inverter to charge the batteries and in the even of a power outage, switch off the line power and switch on the inverter. I have a small Universal Power Source that does just that, I use it to keep my Internet router and modem powered during power outages. I only want enough power to keep my (gas) furnace running during winter blackouts.