I know people do large projects in the Arduino IDE, what I don't know is why.
For much the same reason a man will choose to attack a coal mine with a teaspoon, I suppose.
Actually, there have been two incidents where I have come across a man trying to mine coal with a teaspoon. The first time, I was walking along on a bright sunny day, when there he was, in a pit by the side of the road. I watched for a while as the fellow painstakingly chipped away at the coal face with the teaspoon. When the teaspoon was full, he’d tip a small amount of coal into a little plastic bucket he had by his side. I said “Hey, man, that looks like hard work: Why don’t you at least use a shovel, or something?” He said “A shovel? What’s that?” I walked him down to the local hardware store where he picked out a nice shiny shovel. When I left him, he had tears of joy streaming down his grimy, coal-dust covered face. He said “Thank you. How can I can I ever repay you?” I said “Your thanks and tears of joy are reward enough for me.” I left, continuing my walk on that bright, sunny day.
Exactly a year later, in the same spot, another fellow, mining coal, with a teaspoon. I said “Hey, man, that looks like hard work: Why don’t you at least use a shovel, or something?” He said, with a certain amount of annoyance “A shovel? There’s nothing I can do with a _shovel_ that I can't do with my teaspoon!” I pointed out in his agitation he had just bent his little teaspoon. Obviously even more annoyed, he said “Nothing that can’t be worked around! Just give me a moment, and I’ll bend it back… and besides, I really LIKE this teaspoon.” So there I left him, wrestling with the bent teaspoon, to each their own.
So sometimes it appears to be simply ignorance that there are superior tools for the job. And sometimes it seems that some people just really like their teaspoon.