Yesterday in a 300pts game, we had the following situation and could not find a clear answer in the rules (or at least: we were totally blind and looked over the rule):

As a rebel, my Nebulon was moving at speed 4, close to the map edge. I managed to navigate the Neb so that it ended on the board, but during movement, it left the game board.

So the obvious question: does this count as a destroy (as it was temporarily off board) or not (as the final position was completely on board)?

If you didn't place it then it was never off the board. Conceptually the ship may be following the path of the movement tool but in terms of gameplay it is only ever in the start or finish position.

I posed this same question a while ago. I think the consensus is that the only position that matters is the final position, so your ship should've been fine.

That is the way it is in xwing even if the manuever template goes off board its the final position that matters

That's my supposition as well. I actually sent a message to FFG support asking about this, but I have yet to receive a reply.

Rules are pretty clear. Start and end positions are all that matters.

Yesterday in a 300pts game, we had the following situation and could not find a clear answer in the rules (or at least: we were totally blind and looked over the rule):

As a rebel, my Nebulon was moving at speed 4, close to the map edge. I managed to navigate the Neb so that it ended on the board, but during movement, it left the game board.

So the obvious question: does this count as a destroy (as it was temporarily off board) or not (as the final position was completely on board)?

Wow that's a fast Neb?

Yeah, Nebs can only do speed 3 Maybe he meant corvette

The force is strong in this Neb!

No, of course it was a corvette. Silly me!