I've pondered it myself, for me it comes down to whether the company has implemented it in an ethical way or simply as a way to maximise profits. In this case I

I've pondered it myself, for me it comes down to whether the company has implemented it in an ethical way or simply as a way to maximise profits. In this case I feel like they aren't being malicious, but I've only used the brush with compatible brushheads for about half a year (was using up my old ones from an older model first).