You'll have to specify as to why you think that might happen. The removal of /follow in battlegrounds 2 expansions ago while still retaining follow in other environments doesn't really suggest that they would have any plans to remove follow completely.
To stay on topic: you'd be reliant on broadcasting movement keys, click to move and doing individual movement. Probably not what you're looking for, but that would be the scenario you're suggesting. We're not always meant to find a perfect substitute of doing exactly what we want if the developers intentionally (which is what you are suggesting) restrict said functionality.
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