"Aren’t there clear ways to interpret this question that are consistent with reality? " None that I can think of. What's an example of one of these "clear ways"?
The nonsense about limiting behavior is clearly not an example, since every single change in velocity is an increase in velocity in some frames and a decrease in others.
I understand what "talking about spacetime diagrams" means, but I have no idea how that talk could yield a clear way of interpreting this question.
More here.
As for this: "This question is always roundly downvoted. Why?". I downvote them to keep them off the front page, where I believe they convey a misleading message that this is not a site for thoughtful people.