Why would I build my own OS from scratch if I could embed Linux in my project? In a word, performance. You know how when you were a kid and turned some device

Why would I build my own OS from scratch if I could embed Linux in my project? In a word, performance. You know how when you were a kid and turned some device like a TV on it worked instantly but these days you might have to wait a minute before anything interesting happens? That's one thing that can happen when layers and layers of abstraction and generic software replace highly specialised firmware designed for each product. Of course building all those layers might be cheaper, faster or easier. Unfortunately that doesn't always mean the end result is better for the user.