You guys are delusional if you think DRS doesn't really hurt Dredge.

Half the time you're on the play and even if you're not DRS lands turn 1 and if the explosive start is there for Dredge you can put it in your own GY to kill the bridges.

Against the Mana-less variant it is THE killer card because they always want to draw and 40% of the time you have DRS sitting there to just eat their plan alive.

Game 1 used to be an almost completely non-interactive romp for Dredge barring an occasional really fortunate sequence of counters that knocked it off the plan. Then game 2 and game 3 gave it chances depending on how hard the opponent had to mull to find some hate.

Now game 1 can turn into a bad run just off the opponent have a 1cc creature blind. Are there ways to get around it? Yeah, Street Wraith can give Dredge a draw in response to the activation and there are other ways also, however the old paradigm where Dredge won 80%+ of game 1's no longer applies and games 2 and 3 have gotten much tougher as well with RiP and Grafdigger's Cage in the mix alongside Relic of Progenitus and the old staples.