I'm going to get fiber in five days. Initially ordered 100/50, but as soon as I have made sure that it wörks, I will upgrade to 300/150 at the same or almost the same price. I just haven't done that yet in order not to introduce any source of trouble before the connection is made and working.
If the other side also has a fast connection, it will enable things like easy remote backups and even distributed compilation over the internet.