My- limited - experience is that only few luminous lenses are really usable wide open. The DSLR Tamrons zooms I've used weren't, at least not for landscapes. I dislike unsharp sides and corners.Was that a rhetorical question? It's bragging rights of course! Also, you imply that you actually take pictures with your gear, that's not how it works!
Just being wider open can be a very theoretical advantage.
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