Easy
The upgrade to the features was nice. It also indicated that as the system's functionality was being repaired, its performance was also increasing. EVen this was only at 40% functionality. Lex could not even imagine what would happen if the system reached 50%, or even 100%!
On top of everything, Lex's system authority had also increased to level 5!
That was incredibly useful, as he could now purchase even more things from the system directly! More powerful and diverse formations, get more detailed answers from Mary, as well as exercise his control over more aspects of the Inn.
Although the notification about his authority increase was the simplest, it was perhaps the most useful.