They are not getting rid of the monorail. It would put so much stress on the transportation systems that already face tons of t stress each day. And it also is a selling point for magic kingdom area hotels.
Yes, this is uncharted territory for WDW. I personally feel that with some exceptions, the “everything stays the same forever” era at Walt Disney World Is over. We will
lose some of our favorite attractions, and in addition, I predict that some more fan favorite attractions will get updated versions to stick around. But the monorail is not a normal theme park ride. It’s a mode of transportation. Calm down.