They may be useless to you due to your schedule requirements, but many of us have a near 100% success rate over many years. I know we'll miss the GPUs when we start traveling again.

For us, they've been the difference between staying local and seeing many countries all around the world. We're spoiled and cannot imagine traveling across any ocean without them.

If you're flexible, you should be near 100%, so I really don't think you're as flexible as you think you are.