When interacting with the system clipboard in Vim, besides using the “+”register, what is a better (elegant) solution?

  question, vim

In fact, I am not very afraid of trouble, but maybe there is a good idea (I don’t know)?

Add the following settings to the configuration file:

set clipboard=unnamed

Such default registers are interactive with the system*Register.

If the version is after 7.3.74, you can also try setting it up.clipboard=unnamedplus, put+Registers are the default registers.