I think 15 seconds at most. I estimate Roglic Roglic' mishap, around 12-15 seconds, so if both of them rode flawlessly, Roglic would have won with Remco + (approx) 10 seconds and all others +20 seconds and more, so a very convincing victory by Roglic on Remco and ofcourse all others.
Took him 10 seconds just to get back on his bike and pedaling. Back up to speed, back in rhythm, crash was easily 20-25+. Plus he's going to be more tentative in the corners after that.
But it is what it is. He makes a lot of mistakes, both tactically and in bike handling. He's just not controlled, he rides still too much on emotion. Some emotion is great, I certainly don't want him to become passive and predictable, his emotion is a big part of his personality and his appeal. But he's not smoothing out those edges and figuring the details it takes to win at this point, and it's been more than long enough.
As an avid mountain biker, it's harder for me to continue be a fan of a guy with such bike-handling errors. He's starting to bug me a bit. I want him to win, but you just can't beat the top guys doing stupid stuff like this in a TT. Not the first crash like this in an important TT.