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Yes, to avoid getting a space heater when you turn on your computer during the summer. In winter it's not really that bad, as you get both compute and heating from the same device.

Lower power bills help too. And let's not forget the ridiculous power numbers that new GPUs are consuming.

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if only 100W would produce any meaningful amount of heat, that would be wonderful. A simple space heater runs at 1500W and can only barely help heat a medium sized room as supplemental heat. Unfortunately (for heat purposes), computers waste a bunch of that electricity on actually doing computations.

The electricity spent doing computations is still turned into heat.

High-end GPUs have been around 250-300 W for a very long time (with the odd xx95 X2 Ultra Titan model consuming more). "Ridiculous power numbers of new GPUs" is a pure-bred meme.

GTX 1080 was 180W. I think everyone agree that 1080 was high-end at that time. What's happening now is that xx80 series now become ultra-high-end silently, as we can also see price rising.

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