Yeah heat management is a massive subject.
Several factors to consider here:
I fly a DBE. Heat sig very low.
1. I always throttle back on jump to negate the "aargh a star" scenario.
2. Turn off all modules except PP/FSD/thrusters/sensors/LS/ADS/DSC
3. Always scoop to the maximum scoop capacity (4A scoop) then zero throttle and scoop. Temp rises to about 64%
No issues with generic heat management. Basic piloting skills tbh, my issue is binaries and neutron stars I will definitely encounter.
Descision made though: going to trek on minus heat sinks.
I'll keep you updated on what I find.
All standard practice while exploring, but if you land next to a star that has another star orbiting it at close range, that star can come within close proximity before you can move away. All you can do is wait for cooldown (or forcibly disable your thrusters/FSD), disengage SC, and then jump from normal space.
This has happened to me about five times in ~1000 hours of play. Most of the time I would have gotten hot enough to take module or even hull damage just charging the FSD to leave if I didn't use heatsinks.
In the images above, my FDL hit 198% heat before I was even able to exit SC, and only cooled down to 70% with everything except thrusters and FSD disabled. A more heat efficient vessel would have fared better, but given how close I was to the star, I don't think there is any ship that could have escaped some damage without heatsinks.