I respect anyone's right to stand as long as they respect other's to sit.
The comparative lack of interest in the safe-standing section and massive popularity of the upper seated section suggests that it's probably not as popular an option as some think. Yes, the age related tenure issue means that many of the younger fans have only been eligible more recently.... but even according to Richard Kenyon, the initial club survey showed that many of the current lower Gwladys St season ticket holders had indicated a preference for the upper tiers. Suggesting that a lot of people stand there simply because they have no choice. That said, perhaps youngsters currently sitting elsewhere at GP will really be attracted to the standing section.
The other thing about standing is that unless the stand was designed for good standing sightlines, the view can deteriorate massively when people stand. Which you see at many grounds now.... not being able to see properly doesn't necessarily help the atmosphere either.
However, I do I agree that standing can generally really help the atmosphere.... so, it will be interesting to see how safe-standing evolves over the coming years. It is still pretty much a trial period for it in the UK. Maybe it will eventually morph into increased ratio safe standing (if they go to proper rail seats) or even medium density terracing (as at the Rugby).
It was very difficult to gauge the "home-end" acoustics the other night, even though it was about 80% capacity. Everyone was there to simply sample the stadium, and the kid's game was pretty much incidental (many around me left after about 20mins). The crowd managed a reasonably loud roar to greet the teams but little more than that tbh. By the time the penalty was scored the stand was almost empty, so again, impossible to judge the noise for a goal. I was sat almost 2/3rds of the way up the stand. But the roof felt too far above to gain any real acoustic benefit. Most of the game was played in relative silence. We could hear the players and coaching staff shouts more than the usual crowd noise. The high barrel roof all around will almost certainly be conducive to a great "Whole-Stadium" atmosphere, when everyone is up for it..... too early to tell if the "home-end" atmosphere will be all that was promised with those "Blue Wall" descriptors etc. The other trials might give a stronger indication.