As PGK found, cordless grinders aren't the most powerful tools. They're extremely convenient for most of the small jobs, cutting clamps, knocking back small patches of rust, trimming edges etc.
Removing wheelnuts isn't the main use for 1/2" impact wrenches either. They are for saving time and effort on large bolts, like those that hold suspension together. A 3/8" cordless impact is a similar deal if you do a lot of assembly work; winding in the 30(ish) M6 bolts that retain the cam-carrier on a K-series cylinder head for example.
And the key to cordless tools is the batteries. You don't want lots of tools that all use different batteries. You want tools that use the same batteries, and several of them.
Edited By Nicholas Wheeler 1 on 25/09/2020 10:32:47
Edited By Nicholas Wheeler 1 on 25/09/2020 10:33:58