OCD appeal only I think, icable routing is no less of a faff than the standard method. It was tight back there when I did my new build, took some time and some jiggling to it all sqaured away and for the panel to close properly. But, you do it one asnd you leave it alone for years. It doesn't serve any practical purpose, but has some limited aesthetic appeal, even though you're not going to able to appreciate it, even through a tempered panel, as it's not the side you're going to see even if your're a 'case on desk guy'. It's also adding another possible component that could fail.
There is only so much you can do with a PSU, first they made them fully modular, then they improved heat and noise, introduced hyprid modes, they made them uber efficient and reliable. PSU's have come a long way, and Seasonic are without the leader in PSU's. But this this smacks of 'we're running out of ideas'.
Linus was struggling to justify it and he was paid to do so.
Best in class with a 12 year warranty you don't need any more reason to buy Seasonic than that.