Jacob Kaplan-Moss

The power of "no"

I wrote this post in 2009, more than 14 years ago. It may be very out of date, partially or totally incorrect. I may even no longer agree with this, or might approach things differently if I wrote this post today. I rarely edit posts after writing them, but if I have there'll be a note at the bottom about what I changed and why. If something in this post is actively harmful or dangerous please get in touch and I'll fix it.

The power of “no”

Last week, I wrote on Twitter:

Closed-source software gets worse with each release (Microsoft, Adobe, …). Open-source software gets better (OOo, Ubuntu, …). Discuss.

Much interesting discussion did ensue – mostly around the exceptions (Apple, Google).

However, I’m less interesting in the exceptions than I am in the general rule. Sure, you can find plenty of examples of commercial software that’s improving over time, and, yes, there’s plenty of open source software that suffers from bloat and creeping features. Still, it’s hard to ignore the trend: closed source software seems prone to featuritis, to bloatware, to a trend of more bullet points at the expense of elegance. Open source seems mostly immune to these pressures.

I see a simple explanation for this, best summed up in a single word:


The Django team has recently emerged from a period of voting on features for the upcoming Django 1.2 release. What’s especially interesting in this context is the list of features we’re choosing not to focus on for the upcoming release. This list includes some biggies:

Can you imagine a commercial project, faced with pressure from within IBM itself, decided not to devote resources to DB2? That’s precisely the type of feature you need to list yourself as “Enterprise Ready,” and yet we decided not to focus on this feature right now [1].

[1]The core team felt that the DB2 adaptor simply wasn’t sufficiently battle-tested to consider for inclusion in Django just yet. There’s a pretty high chance we’ll revisit it at a later date, though.

Django Debug Toolbar is one of the most popular add-ons to Django – in fact, I’d go so far as to say that it’s basically a required tool in the professional Djangonaut’s toolbox. Including it out of the box in Django is a highly requested feature. But we left it out: the lead developer wants it to remain a separate project, so that’s that.

As for South, well… The lack of built-in schema migration might just be Django’s biggest weak spot right now, and South is, more and more, becoming the de facto standard Django solution. Again, though, the developers (both South’s developers and Django’s core team) felt that South would be better served by more time as a separate project where it can develop at its own pace. So it’s not a priority for Django 1.2. Simple as that.

Were Django a typical commercial project, I have no doubts this would have turned out quite differently. A manager, noticing that schema evolution was the #1 requested feature, would have listed it as a must-have for 1.2. A salesman would have promised a big potential client that 1.2 would ship with the debug toolbar. IBM would offer to help sell Django to its clients if we only included DB2 support.

Sure, developers would still have objected in the same way, but those objections would be overturned by management or marketing. Release dates slip while developers scurry to integrate not-quite-baked software… and hey presto, it’s Adobe® Django© CSX™.

Open source cleanly avoids these issues by letting technical voices have the last say. As a maintainer of Django, I spend a lot of my time saying “no,” and there’s no management above me to countermand those orders. There’s only a group of my peers, all concerned with technical quality over all else.


This piece uses the words “open source” in a deliberately vague manner – of course, there’s nothing in any open source license that provides for this technically-driven model. I’m more specifically talking the (typical) open source development model, not any particular open source license.

I’d argue that the model of development, not the license, is the critical factor in open source’s success… but that’s another show.

Indeed, this helps explain companies who are putting out closed-source software with open source quality… but that, too, is another show.