I would also take the features and integrity of the old mount into consideration. If it doesn't articulate, for instance, or if it doesn't have tilt adjust, then it might be worth upgrading the mount itself while it's off the wall.

I would also check for smooth operation, cracks, bulges or dents, or severe corrosion (unlikely near a TV but you never know). If the mount shows any of these, recycle it and get a new one.

As the article mentions, keeping the TV on the wall successfully for the long haul is the ultimate goal here.