I would be telling a lie if I said that I even considered the question at the time. It would imply that we had a plan and a vision for the future. The reality was that it was much more a case of the proverbial scratching an itch.
“Every good work of software starts by scratching a developer's personal itch. – Eric Raymond, The Cathedral and the Bazaar”
There is no great all encompassing vision or long term roadmap. While there is just one person who has a need for Joomla and there is someone for whom further development scratches their itch then Joomla will exist in some form or other. That’s probably the difference between Joomla as a 100% volunteer and other projects which have an economic interest.