Except that the power of Congress to "regulate Commerce ... among the several States" does not mean that Congress has the power to regulate an individual's commercial activity. It means that Congress has the power to forbid a state from interfering in commerce taking place across state lines.

The problem with Raich and Wickard (et al.) is not that they extend federal power, but rather that they invent it of whole cloth.

The argument in Wickard is that growing wheat on your farm is interstate commerce because if you grow your own wheat, you won't buy someone else's wheat, which affects the interstate market for wheat. How does that depend on technological progress? Seems like it would apply as long as wheat were sold across state lines at all.

Technology has nothing to do with it. Activity that does not involve trade is not commercial. Trade that does not cross state lines is not inter-state. Non-commercial (no selling, no trading) private activity that never leaves your property is not interstate commerce. The sky is still blue even if the Supreme Court says it is yellow.