Wow, it sounds like "Dave McD" has had some problems with four stroke motors. Perhaps trying to run them too lean and tossing some props? Whatever his misgivings, they're obviously based in a lack of engine experience, which caused him to throw a little temper tantrum via a webpage. Some people just never get the hang of some things, but should recognize their lack of skill or knowledge with a particular item for what it is... "Lack of skill or knowledge". Obviously "McD" is challenged in this area.

Did anyone mention fuel economy? 4 Stroke motors are generally more fuel efficient than 2 Stroke motors.

How about cleanliness? Stick a 2 Stroke motor on a plane and bring lots of windex to clean it up. Use a 4 Stroke, and bring a little windex.

As mentioned, 4 Stroke motors can swing larger, and often more scale sized propellers in a more efficient manner than 2 Strokes.

4 Strokes are quieter, and in most cases more realistic sounding.

Don't get me wrong, I am a 4 Stroke fan bigtime, but I also own 2 Stroke motors. Each have their applications and followers.