The trend makes sense since Tolkien had rather conservative view towards technological progress. He witnessed the english countryside being destroyed by industrialization and war, and he had a deep love for nature, so it figures that he is more or less reluctant to progress and machines, and it really shows in his works. That's an aspect of his literature that, depite being called old-fashioned or too conservative, still makes it relevant in today's world.
I would say even more relevant today than before, now that more people tend to realize how precious certain things are.
I don't think Tolkien would have been against progress in general but the words of Gandalf to Saruman seem to sum it up perfectly: "He who breaks a thing…"