That may be true. Perhaps it's the ever-changing nature of creating cards and expansions; if Fallen Empires or Homelands (just to give two examples) had "stronger" cards like today's sets, they would have been more prevalent in tournaments (not counting the "contrived" tourneys like the first Pro Tour where you had to have 5 cards from every expansion). Perhaps WOTC raised the bar on themselves in terms of how many "chaff" cards are in current expansions versus past. And/or they've learned what works and what doesn't in the 10+ years since those expansions <shrug> Could be a variety of factors that comes down to the perceived notion that the themes in today's expansions force you to play them in Standard tourneys 