I've said for many years that people often overstate that the 'best of the best of current day photographic equipment' is needed for good photos. Landscape photography is one of the photographic genres that have less of a demand on equipment essentially than some other genres (eg sports).
I agree here. With sports you may need high class auto focus and low light capability to be able to make the shot at all. With landscape, you can make the shot with any equipment.
However, with landscape and other slow tripod-mounted photography you also have the ability to max out what the camera can do in terms of resolution and dynamic range. This can also be appreciated by making large high res fine art prints, and landscapes are often detailed so there's small details to discover. So while the equipment will not lead to better images artistically, it can certainly improve print quality. How important that is, and how good "good enough" is, is a matter of taste of course.