As somebody who has a couple of Makita tools and batteries, it would be really bad if they were hypothetically forced to change. Specifically because not being able to get new tools that use my existing 18V batteries would mean buying a whole set of new batteries, and then it’s so annoying keeping two kinds of batteries that when the old ones wear out, I’d probably instead buy new tools for the new ones. So the old tools potentially become e-waste far sooner than they would be (the old batteries wouldn’t be available forever) as well as the waste of resources for the premature replacement of all the tools and batteries…