I've never actually checked the threads. Then again, I never really gave much though to the drain plug at all; I've uhad zero worries about stripping it. Steel bolts into aluminum aren't exactly anything new. Of course I do my own oil changes and don't take it to the quicky-lube monkeys either.

As for the oil extractors I have several and use them regularly - just not on my cars/trucks. In the boat world you have to either suck the oil out from the dipstick or have a drain system plumbed into the pan since you can't exactly get a catch can under the engine when it's sitting in the bottom of the bilge. I'm not a huge fan as they never get all of the oil and you just know the worst crud will be built up in the lowest point. It's also nice to have a magnetic drain plug you can inspect when you remove it.

Hate to be the bearer of bad news but the threads are aluminum and they WILL eventually strip. This happened to me and after ruling out a new pan as an option (the part is $1800) I designed a new plug and had a local fab shop help me with the machining. It's been installed a while now and works fine. Changed the oil for the first time with it a few months ago. Takes longer (smaller drain hole) but that's ok. I had a home tapped into an OE drain plug and fitted some stainless steel pipe fittings to it. I then permanently put the drain plug in. Their is a new cap at the end of the fitting that is used for draining.