JM,
Your 3rd paragraph described many of the newer people to this sim. They've seen pics of all the new toys that have been added, but when confronted with a large or multi-place install, they come running here for help. Oh yea, and without reading the README or KB.
It's the "I want this now" mentality.
Getting back to the SF series though, there are still many things since Day 1 that have been broken or never implemented. People expect 100% for any amount of money paid. Be it $50 or in this case $15-20. Releasing a beta level product as a final was bad and it opened a floodgate of complaints. Some of which have been stifled for a long time. However, it's all about the way people compain that will either make or break us. Like that line in Saving Private Ryan. "This is the way to gripe..."
If TK decides to lock everything, then I'd predict it would be the end of his sims. Mods have kept air in the TW lungs. They've bridged the gap between new products, keeping some freshness to an old sim. Without them, it's game over and people will move on.
Jeff