Streaming or storage

Hi experienced streamers and downloaders,  

Some months ago I posted a question about what I needed to stream music and to digitally archive my records and CDs. The Agon members answered a lot of questions and I decided to use TIDAL to get on line music. I am enjoying my TIDAL subscription played through a Bluesound NODE2.  I use the Bluesound control app to access MY PLAYLISTS on TIDAL. Most of the time I use my Android phone as the controller. The sound is great (TIDAL HiFi is really good). Here are some questions: if I am really just streaming and I find the sound quality so good, why should I consider downloading?    Sound-wise, what will downloading give me that streaming won't? Isn't the listening process easier if I just stream music as wanted instead of downloading and needing lots of storage?  Is there a chance any given song, album or artist will be removed from a streaming site so I should download just to make sure I always have the music I want?

Thanks for your advice,

Ray