I don't agree with the notion that modern gamers seek 'quick thrills' and make purchases without expecting to play them for years to come. As maatriks's post brilliantly highlighted, a well developed game can create a fanbase which will stay loyal to the title for a number of years, even preferring it over any sequels released. In the shooter community, Battlefield 2 (2005) is still hailed as one of the best online FPS experiences money can buy, and still boasts a healthy online presence all after all these years. Among Elder Scrolls fans, Morrowind (2002) is often praised as the best game in the series, and has a truly incredible modding community dedicated to keeping it up to modern standard both in terms of functionality and graphics. Paradox's strategy title Hearts of Iron II (2005) is much the same. This can be said for so many games, there are communities spread across all genres who are loyal to certain titles and dedicate vast amounts of time to playing and improving them, just as the rFactor 1 community has done.
The face of gaming itself is changing, where as in previous years we were a closed group of society, the lines that once defined us as gamers have blurred. Now days it's safe to say almost everyone is a gamer: everyone has a game on their smartphone, millions come home from work and spend a few hours on their console, children grow up with handheld Nintendo's. These casual gamers may posses that instinctive desire for a quick thrill or short experience with a game. But I firmly believe that the gaming core still appreciate games just as much as we always have, and some of the communities I've mentioned are exemplary of this.