I have my very own view on (A)D&D : All those C-RPGs (computer-based role playing games) which feature the (A)D&D rules are to me like clever product placement for TSR / Wizards : People are playing these games, get accompanied to the rules, and want to play them later as "pen & paper" (P&P) games as well, eventually.
And considering how far and wide the distribution of these games is, it certainly adds to the world-wide market of the P&P stuff that these C-PRGs are sold so widespread (meaning world-wide).
Unfortunately, there are very few other C-RPGs using other rule sets, like DSA or Midgard, for example, or small ones created somewhere in countries or areas we might not know of, so even if there *might* be better systems than (A)D&D, we won't see them because of its dominance, and publishers not producing games with *other* rule-sets.
That's basically what I meant with my article at RPGDot, which was greatly misunderstood (greetings to the guys at RPGCodex ).