That is an interesting point. I will think about this and hopefully this knowledge will cure me and save me thousands. Seriously, I could do other things with the money, like go to Disneyland for a day or something. I'm not trying to be a smartass and insult your comment, you have a good point actually, but I just realized how depressing the cost of Disneyland admission has become. Go for a day and you can throw that SLI away.
You are probably right. I agree that some games are at their standard, default appearance when on normal or maybe high settings, but then some ridiculous crap is included which wrecks the performance and they call it "ultra". I understand that and that happens. When that happens I just don't use those settings.
Most of the time I try to have the best GPU setup I can afford, and if I can afford it, I'll go for the best possible. I can't always afford it, but when I can I will usually go for it. At that point, if a game lags or doesn't run well on max settings then I can tell myself there is nothing I can do to change that. I already have the best GPU's I can afford or there is simply nothing better available to buy, so I will live with the lag or lower settings.
If a single big pascal or Vega can wreck BF5 nicely, I would be fine with that. Currently my twin 980ti's are rendering nothing but RocketLeague, and that's ridiculous, lol. I'm sick of BF4 and don't play it much anymore actually.
I don't always play games on Ultra, but when I do, I prefer MGPU.