Landscape does not mean wide angle, some use 300mm. It all depends on the subject.
Stitching images brings its own distortions, and a proper head + good stitching software is expensive, and unlike a lens, software has little or no resale value. It does yield supurb results when done properly.
A TS lens works well, but they are very expensive. At least, they have resale value.
I'm sure there are lots of different takes on this, and all have merit, I'd not argue with opinions because they have worked for the poster.
Lightroom 5 has some pretty good lens distortion and perspective correction, I'd like to see a wide angle expert post some corrected landscape images using the upright feature or the manual distortion correction. You lose some of the image, but not as much as with stitching..