Not worth it

Tested on a very basic and clean theme with latest version of wordpress.

The smooth scroll works good, only at the first time. If you click on more links of the same page, the smooth scroll is gone.

Other thing:
I needed to disable the “back to top” feature. For this, you have to delete some line codes. This is not a good idea if you are willing to update the plugin in the future.

I thought of disabling it by css with display: none, but, surprise, there was a style element with display “inline” in the code. I don’t understand why devs force their style in the code, css is made for that.
I had to put visibility:hidden in my css. It is not a sustainable solution.