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I am a wheel re-inventor. Nice article. The _Specificity_ reason listed is usually the driving factor for me, with the others being downstream effects. In short, the wheels are often built for a different chassis than the one I'm using. Adapting these may be more difficult than making a new wheel.

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This. I'm trying to set up a personal developer blog and I have a very specific set of requirements. Tried several static blogging frameworks. Apart from the software bloat, I found myself spending a gratituous amount of time trying to customize pieces to my needs. Finally got sick of it, landed up writing a python script and after a few days and < 200 lines of code - I have a working prototype that fits my current needs. I will be doing more of the wheel re-inventing for other projects I have in mind. I strongly agree with your observation that adapting generic frameworks to specific needs probably have longer learning curves than just building a new wheel.

The specificity reason is interesting as it relates to what feels like an assumption in software that all software components are neatly shaped boxes that a) perfectly encapsulate an area of functionality and b) can be placed into neatly shaped holes of 'required functionality', neither of which ever seem to be true.

The boxes are always weirdly shaped with odd edges, and the holes they have to fill are always oddly shaped. The code written to join the two is at minimum glue that seals the two edges, but also usually involves converting one shape to another.

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