A cordless impact driver won't undo wheel nuts, you'll need to crack them first and tension them properly by hand. That's no big deal.
My personal Milwaukee stuff used the older brushed motors and I still have 4 ah batteries and I have always ussed the impact driver for wheel nuts and whatever. The reciprcating saw I have for the garden nd some track clearing has copped an absolute hiding and still going strong.
My work Milwaukeegear is brushless and the impact driver is playing up at the moment . It just slows randomly and I am not too happy about it.
All I use is Milwaukee for work and personal use, both kits get used and used hard.