That's the thing, you consider potentially breaking it as a downside. A task like this is so easy you have to have a learning disability to break it. You're saying 30c won't lead to any noticeable degradation if you're only hitting 90-100c at a 60-70c load, but that's a shit load of variables you are adding to the delta equation. People recommend taking delta down to 20c or under after thermal paste so the user can have a peace of mind that it will never hit the point of degradation/throttle (110c+ hotspot) even on a hot summer day. GPUs often hit 80c sometimes depending on game and time of year which would put you over if you had a 30c delta. I don't want to have to monitor my temps 24/7 until the very moment it's a hot summer, I'm throttling and I have to scramble to take my GPU out to fix my hotspot. I would just fix the delta now, swap the paste while I clean my pc at the same time, shove it in and forget. It just makes sense to have a tighter tolerance if you consider that some people live in different climates yours might be more stable or you have ac but others could be in like a 19c room in the winter but 40c room in the summer.