I can't find any statistics on VGchartz over morrowind, how much did morrowind actually sell, and where can I see stuff like that?
Hm. I had based my statement on a developer comment I remembered reading some time ago, but I can't locate it now, so it's inadmissible.
That said, http://www.gamespot.com/pc/rpg/theelderscrollsivoblivion/news.html?sid=6147356 While I can't now demonstrate that Morrowind had indeed sold around the same as Oblivion, the fact remains that 1) Morrowind is now 7 years old, and yet you can still find it at your local Best Buy or sometimes Walmart. That is an achievement unmatched by most games. 2) Morrowind existed on only 2 platforms, whereas Oblivion existed on 3, which naturally == somewhat higher sales for the latter independent of its reception and design style.
The other issue is how much either game whetted the appetite for the player to buy the next in the series. If I'd started with MW I may have given up on TES games. OB hooked me into the series and I'd probably be among the first to buy the next in the series if and when it's available.
Another interesting point to note: Those who started with Morrowind did the exact same thing for Oblivion. Those who played Morrowind weere among the first to get hyped over TES:IV and among the first to go out and buy it. Which arguably swelled Oblivion's sales numbers even further. Just as Daggerfall fans swelled Morrowind's sales numbers further.
I get the feeling you're trying to make TES:III out as this fringe game. Keep in mind that Morrowind players essentially financed Oblivion. Its sales and popularity couldn't have been too terrible, then.
Further, I'm not saying that I want a Morrowind 2. FO3 is by no means a Morrowind 2, and yet FO3 echoes with Morrowind-tone and feeling.