But Microsoft fucked up on Double space. First, it had a tendency of trashing your hard drive, and then, upon some contract specifications, Stacker sued Microsoft. How did that happen, no one knows. That forced Microsoft to get all versions of MS DOS 6.0 out of the market, to replace it with DOS 6.1, with Drive Space instead of Double Space. But the dammage was already done.
Few people use stacker now.
Not to mention Norton Utilities. Now, Microsoft still does the same. Amiga was doing that with no hard disk. Explorer is out, another copy from Netscape, plus the bugs. Some day you have to register your wife to make sure she complies with IEEE standards.