I have been weaving for over 50 years, and even back in the late 1970s I was using my Atari computer to render my weaving patterns. Back then, the computer simply rendered the threading/tie-up/treadling/drawdown like squares on graph paper. It was still easier than coloring it in myself.
And then, in the early 2000s, our guild introduced me to the next level of weaving software -- WeaveMaker for Macintosh. Wow! My weaving world was turned upside-down. I soon bought a computer-assisted loom (first a Louet Megado 16, then a Louet Magic 24, and finally a Louet Megado 32). And now Fiberworks software has replaced WeaveMaker and I love it.
Designing weaving patterns in color on up to 32 shafts completely changed the way I thought about weaving. It is so easy to change a tie-up or treadling or experiment with color. The possibilities are endless!