For years i ran Snap on 18V impacts, Dewalt 18v cordless tools and Milwaukee M12.
when i finally got sick of buying multiple nicad batteries a year i ditched them all for milwaukee M18. selling off the major dewalt kit and three snap on impacts I had allowed me to pay for most of the milwaukee system to start with.
No one wants to buy a 500 dollar drill kit, then a 500 dollar impact kit, then a ratchet kit, then a circular saw kit, then a recipe saw, then a grinder kit, then a blah blah kit.
buy a couple kits, or stuff on promo with a free battery and charger. this allows me to carry a charger on the service truck, have a charger or two at the shop, then a charger or two at home.
buying bare tools works better for me so I can have similar tools at my home shop, my work shop, or service truck.
I'd have 25 chargers and 10K in stuff if I bought them in kit form....