Sorry, but who uses 35mm for landscape photography? Wouldn't no less than 4x5 be better? I used 120 for the clouds shot and I'm moving to 4x5 in the future, like right now. 120 is alright, but for sharp detail in backgrounds, I reckon a larger format is needed. Of course it depends on your depth of field, but just the same, why have a murky out of focus background due to a format that is too small for the job? Good clean bokeh is just as important as a good sharp subject.
Yes Plus X Pan is discontinued so I'll refrain from mentioning it any further. I liked the rendering of the blacks and whites and all the tones in between, there's a magic about them, and perhaps it's the fogging of the expired film that suppresses bright highlights that warranted my attention, because blown out highlights have been a thorn in my side almost forever. I need to learn how to meter like the Pros. It's also fine grained if developed in fresh diluted developer, or even the second development of a one-shot developer. So, with Delta 100, I will be using semi stand or a much diluted developer process in the future, and experiment with times, to get slightly flatter images that the scanner can handle, and then post process to suit my taste.