[alnvdl]

Mid-way through development, once I still had to solve the problems of sharing and printing, I almost gave up on continuing the work because I thought: "it surely must be easier to just learn a CAD application".

But as another commenter highlighted: that meant a learning curve not only for me, but for my wife as well. And then there was the challenge of sharing it with everyone else via email, IM, etc. Having it open in the browser means it's easy to share, and fast and easy to load and show to people anywhere (which is handy during construction).