I'm jumping into this discussion late, but here's some of my thoughts...
I've always loved Bruckner, probably as much as Mahler. I think author Jim Svejda (of the Record Shelf Guide) has a point when he says that for a Bruckner performance to work, all things have to work well. A second or third rank orchestra with an average conductor can deliver a pretty tolerable Beethoven performance. That usually won't work for Bruckner.
But more importantly, I think many don't find themselves drawn to Bruckner because of the epic expanses of his works. In this microwaved, drive thru, instant downloadable world we live in, it's tough for many to listen to an 80 min symphony unfold.
It may sound unusual, but I adore the early numbered symphonies. To me, his 1st is remarkable: dark, mysterious, even angry in spots. The second is ethereal, but kinda sweetly naive, too.
That various texts confuse matters, but for me most things are resolved today.
I see Mahler and Bruckner as descendants of the Beethoven and late Schubert line of symphonies, rather than the Schumann/Mendelssohn. Mahler was more of an innovator, but sometimes I'll stand back in awe of certain things Bruckner did. The Ninth is remarkably modern to me. Its scherzo reminds me of Shostakovich. There's a string passage in the last movement that sounds like Bruckner stole it from Vaughan Williams, even though Bruckner obviously wrote it first. I think minimalism, which I love, is indebted to Bruckner.
I guess in conclusion, I'll say that orchestras are probably better equipped to play Bruckner today than in the alleged "good old days." But I don't think audiences are. So perhaps Barry has a point. But the last time I heard Bruckner live, it was with Skrowaczewski leading the Saint Louis Symphony Orchestra in Bruckner's 4th. Going into that concert, I was kinda falling away from the Fourth. But at the concert's conclusion, I found my faith in it reawakened, so to speak. I think the audience realized they just heard Something Special, and I heard one of the best rounds of applause for anyone in my 16 years of concert attendancer. Somehow, the conviction of the performance locked everyone on to Bruckner, if only for a night.
Thanks for putting up with my thoughts...
Cheers,
Steve