You need to know that most power tools are ultimately owned by only a few brands
Milwaukee and Ryobi for example are both owned by TTI but the Marketing is strong.
https://www.protoolreviews.com/power-tool-manufacturers-who-owns-them/
Well, yes, but they serve drastically different markets, and the ownership structure is different. Ryobi is for the home owner that occasionally uses tools, and is licensed by a Japanese company to allow TTI to produce the brand. Milwaukee is for heavy daily use, and is wholly owned by TTI.
Its also worth mentioning that adapters are available to convert between battery systems. If you’re on Milwaukee and want to buy a DeWalt palm router (which is superior IMO) then you can just get a converter to use it with a Milwaukee battery. You can keep the converter in the tool itself, and most tools don’t mind this.
The exception is Ryobi. Converters only exist one-way, since Ryobi still uses “stick” type batteries for low voltage stuff. The opposite converter could theoretically exist (say, to use a Ryobi battery with a DeWalt router) but it would be very large and bulky and so nobody really makes them.
Ryobi batteries in general are very bulky. That 12 AH is like strapping a boot to your tools. It’s also seemingly their weak spot, as all I read is people complaining about their batteries.
