Vector Math Single - a node for math operations designed for a single vector.

It confuses me when I see operations in the Vector Math node that are intended for one vector, but there are two of them in the input. I think this is wrong and propose to spread it to different nodes.
In this case, I created such a node for operations of normalization and calculation of the vector length, and delete these operations in the Vector Math node.

If you create universal nodes, you can confuse the user:

for some operations only one value is needed;

for others, only two values are required;

for others, the operation - as much as necessary.

In this case, there will be many checks on the node itself (the + or - button is available) or the node will mislead the user. The fewer the settings, the easier it is to deal with it, which means it is more convenient to use.