Again...incorrect. His best songwriting outside of BtR and Darkness, was on The Rising, and again of late w/ Western Stars and his most recent album last year w/ the EStB, (Letter to You) which is fantastic.
His "height" has never waned, as evident by all of his tours/works from 2012 to his unbelievable Broadway run. You are too focused on his "hits" that received air time instead of his body of work. He is probably more popular now than at any time since Born in the USA. His tour next year will be ridiculous.
I am biased, as evident by the # of times I have seen him and having studied his music for many, many years. I don't like his politics, but he is arguably the best singer/songwriter ever, and his live performances speak for themselves.
Your first paragraph is completely subjective and my post said that we can debate the quality of his most recent music vs. 'classic'. In your opinion, his best songwriting, blah, blah, blah. OK, I'll grant you that your opinion is that but it's clearly not a definitive, objective statement.
As the Rolling Stones will attest (owners of the #1 grossing tour in 2021), having sold out tours has very little to do with the height of his popularity. I have no doubt that if they live to 100, Mick and Keith will still be able to put 50K people in the stands to watch them play 'Jumpin Jack Flash' and 'Start Me Up'. Are they still at their height?
When you've been around 40+ years, it's pretty easy to sell out a show when you have fans from multiple decades that continue to pay outrageous prices to see you play the hits and a few new ones. Probably more popular now is very much a subjective statement. At his height, his albums and his shows were 'must see'. Hard to imagine he's gathering many new fans nowadays. I was a big fan but haven't listened to him for 20+ years at least. If you believe a Springsteen tour today would generate the same buzz as it did in 1976-1984, you are delusional.
Best singer/songwriter ever? Could there BE a more subjective statement? I agree, in his prime, his live shows were dynamite. Having him play acoustic songs to a fawning Broadway audience (at least the special I watched on TV) wasn't exactly riveting. And, honestly as a longtime guitar player, I didn't see exceptional songwriting craft on display during that special. It was fine but nothing really stood out as far as craftmanship (I know, I just foisted a completely subjective statement on you. When in Rome...).
I know you love you some Springsteen and that's fine. But enough with the 'I'm an expert and your opinion is not worthy' attitude.