A typical use case for large laptops is when you want to store it away after work or when you only carry it occasionally. I have a PC for coding at home, but use a thinkpad with the largest screen I could get for coding in my camper van (storing it away when not using it, because of lack of space) or when staying at my mother's home for longer (setting it up once at the start of my visit). I also have another very small, light and inexpensive subnotebook that I can carry around easily, but I rarely use it these days and not for coding at all.