I have done both hot and stone cold oil changes. over the 196,000 miles on my 911.
It is hard to argue with Blackstone. They are the testing lab most people use.
I have a drain valve on my oil tank.
It is nice to slow the massive rush of oil when the oil is hot to avoid the splashing. I have a metal "zip tie" strap on it to make 100% sure it is not opened without a pair of cutters cut the strap off.
And draining the oil from the lines and the front cooler seem overkill to me. With all that oil, and it never gets black, it is just not worth the effort.