I think the statement forming this thread should read:
<em>
Detached condos have greater resale value than townhomes.</em>
The real debate is in the amount f the premium. If the market premium is 25%, it is not necessarily a better buy because the premium is too high. If the premium is 2%, then it may be a better buy because a future buyer may be willing to pay a larger premium.
As for the driveway, you are missing the premium for "private." You can't park your car, have friends visit or really "use" your condo driveway. In fact, I will tell you the builders generally do not like building SFD condos because they get complaints from homeowners for years after they complete construction. It is not uncommon for someone to come out in the morning ready to go to work and find a neighbor blocking the way out. If you can't find them, you must wait for a towtruck to clear your path. Then you must deal with an irate neighbor when they have to pay a towing bill. Private drives make for better neighbors.
The other thing you are overlooking is the larger lot sizes of SFD as compared to condos. The whole reason builders create SFD condos is to increase density, so the yards are going to be small patios.
Personally, I do think SFD condos are good products. They fill a market niche between attached condos and SFD homes. I would consider it quasi-transitional housing. I wouldn't want to live in one long term because they are a bit claustraphobic, IMO. I rent a large attached condo, and chose it over a comparably priced detached condo. I got much more space for the same money because I didn't have to pay the detached premium. I think it lives better because of the additional space.
To each his own, I guess.