Why Excel?

When asked why I develop in Excel, the answer usually contains one or more of the following points:

1. It's the most powerful platform available
The spreadsheet as a design paradigm is incredibly powerful, which is why Excel has become THE standard business application - used throughout the world for the past 18 years with no signs of ever fading away. The cells, rows and columns provide a great scaffold for your data, charts and text. The spreadsheet provides an elegant data entry, data storage, calculation and transformation infrastructure, and contains everything you need to support just about any complex business functionality imaginable.

2. It's high-level
One of Excel's greatest features as a development environment is all the built-in functionality you get. The Excel object model is comprehensive and well-documented. Integration with other Office applications is seamless (well, since 2000 it's been pretty stable.) Want to generate a report? Just lay out the worksheet the way you want up front, drop the data in, and you're done. 10 lines of code in VBA, using Excel's standard interface, can take the place of several hundred lines of standard Visual Basic code (or several thousand lines of C++.)

3. Everybody's using it
There aren't very many Windows PC's in the business community that don't have Office installed. Kids are learning to use Excel in schools, and most people use it in some aspect of their work, from data entry clerks to CFOs. The XLS file format is viewable on every operating system that supports e-mail attachments, including most cell phones. In short, Excel is, without a doubt, the most popular application in the business world. It was Lotus 1-2-3 on the IBM PC which enabled the Business PC revolution, and Microsoft created Excel in Lotus' image.

4. It's a known entity
Along the lines of number 3 above, Excel is already on just about every business desktop, so you don't need to install anything on the corporate network when you deliver a solution to a company. It's easy to send an XLS file attachment to a customer by email, but asking them to download and install an executible file is another matter - probably won't be allowed at all in a major corporate environment like a bank.

5. It's well supported in the community
For developers, you can be reasonably sure someone else has already done what you're trying to do, and has worked out the tricky parts for you. Bugs in Excel are well known and workarounds abound. Forums, support groups and blogs such as this one provide an incredible wealth of knowledge for beginning and seasoned developers alike.

There are many other good reasons to develop in Excel - what are yours?