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- Newsgroups: comp.arch
- Path: sparky!uunet!wupost!uwm.edu!daffy!uwvax!wilma.cs.wisc.edu!mfrank
- From: mfrank@wilma.cs.wisc.edu (Matt Frank)
- Subject: Re: What's in a name?
- Message-ID: <1992Jul25.075130.7192@spool.cs.wisc.edu>
- Sender: news@spool.cs.wisc.edu (The News)
- Organization: University of Wisconsin, Madison -- Computer Sciences Dept.
- References: <1992Jul17.220112.20995@microsoft.com> <1992Jul20.092822.7666@spool.cs.wisc.edu> <MKAHN.92Jul22092527@hopi.sedona.intel.com>
- Date: Sat, 25 Jul 1992 07:51:30 GMT
- Lines: 78
-
- In article <1992Jul20.103537.57342@cc.usu.edu>, ivie@cc.usu.edu (CP/M lives!)
- writes:
- >In article <1992Jul20.092822.7666@spool.cs.wisc.edu>,
- >mfrank@wilma.cs.wisc.edu (Matt Frank) writes:
- >> Now, assume that Win/NT takes off and everyone buys it. Will anyone buy
- >> WordPerfect or 1-2-3 anymore? NO, they'll buy something else (very likely
- >> Microsoft Word and Microsoft Excel).
- >
- >Not initially. It needs to run the old stuff long enough to convince people
- >that it's going to take over the world. It takes time for software to ramp
- >up and for the software guys to decide which platform to use. But the
- >software guy's decisions are based on the hardware that's selling. People
- >don't want to buy hardware that holds the _promise_ of eventually running
- >useful software, they want to run useful software _today_.
-
- Both the Apple ][ and Mac are examples of non backwards compatible products
- enjoying great success. So are CD players. Although it was before my time,
- aren't CP/M, minicomputers, DB2 and UNIX other examples?
-
- And in article <MKAHN.92Jul22092527@hopi.sedona.intel.com>,
- mkahn@hopi.sedona.intel.com (Mitch Kahn) writes,
- >] 1) Backwards compatability is a waste of everyones time.
- >
- >Better tell that to DEC, IBM, MIPs, Motorola etc. as well as all the users
- >in the world who do not want to buy new software every time they get a
- >faster box. What color is the sky in your world?
- >
- >]
- >] 2) Nobody ever uses the backwards compatable features anyway.
- >
- >You're right. I'm getting a new workstation this week and to celebrate
- >I'm going out and buyin $10K worth of new (incompatible) software just
- >because some technogeek decided incompatibility wasn't an issue. NOT
-
- I said "BACKWARDS compatible" not "compatible". In my original post I PRAISED
- the idea of a faster 8086. While I'm at it, I'll also praise the virtual 8086
- mode on the 80386. It was a great idea to allow users to multitask their 8086
- sessions. If people buy a computer, then I'm all for vendors coming out with
- faster versions of it.
-
- Nor was I intending to single out Intel for criticism. I used Intel as an
- example because the x86 is the chip I know best. I've been an MS-DOS
- programmer since 1987, and I own a 386 box. I LIKE my PC-compatible computer.
-
- What I WAS criticizing is that the NEW features in each generation of a
- backwards compatible design are more complicated than they would have been
- had those features been part of a new design. In the case of processors,
- customers coming over from the old design are winners (but they would have
- stayed customers if the designers had just come out with a faster version of
- the same chip.)
-
- New customers might lose because:
- A) the processor may be slower than a new design would have been, or
- B) optimizing compilers and assembly code may be harder to write than they
- would have been (so software is slower), or
- C) they pay for new features that rarely or never get used because software
- manufacturers won't take advantage of them (as is the case with MS-DOS).
-
- To use a database example: IMS on the 370 had great staying power for years
- because thousands of customers had a huge investment in applications and data.
- When DB2 came out though, the advantages were so numerous that customers
- started moving to it. (Mostly they write new applications in it, and leave
- the old applications in IMS until it comes time for a major rewrite).
-
- (Perhaps even more interesting are the shops where they slowly replace all
- their terminals with networked PCs running terminal emulators. Then once
- they have a PC on every desk they buy Oracle.)
-
- Lots of companies have made lots of money, and stayed profitable, by
- continuously coming up with innovative new ideas. The argument that no one
- will buy a fantastic new design unless it is backwards compatible, doesn't
- wash.
-
- If anyone wants to mail me other backwards compatability examples (pro or
- con), I'll summarize.
-
- -Matt Frank (mfrank@cs.wisc.edu)
- My opinions are my own and may not be those of
-