Any comments about using ROON while you are OFF LINE ??

Good Evening,

I understand Roon is meant for a home network that also has internet access for relevant data to your songs, album art, whatever, as well as new songs from streaming services.

I am asking have you ever tried using Roon while your internet is down?  Does it still work fine with your own music that you have stored on the server?  Does it still provide relevant information to support those songs? (I am thinking maybe it stores that info from the last time you played the same song?)  Or would you say that with no internet, the usefulness of Roon goes out the window entirely?

Reason for asking, if i buy a lifetime Roon license and then decide to shut off my internet some years in the future after the price of internet goes up to $200/mo.  how stupid would that be?  Really, really stupid, or just a bit stupid?  haha.

Thank you for your comments.