I have five or six Makita 18v batteries and a load of their tools. If they only make new tools with the new battery they are potentially making me quite miffed. If I want the new tool I need also the new batteries and charger. Also I'd need multiple batteries because you can't really only have one.

Personally I'd be happy for that situation because of the big upside, but I can see why a company would not want it.

Plus, the most logical thing to do is not make a new standard, but pick an existing one. But who gets to be the golden brand whose battery system remains unchanged?

I would love it to happen but I can't see it happening for a while.

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…