Sure - it saves printing costs and trees. Someday we’ll probably have iPads instead of hymnals in the pews.
I now use an iPad mini when I sing in our Gregorian schola. The others still print out the score and put them in a chorister’s music binder. I used to work in the paper industry, I’m trying to expiate the sin of killing so many trees
I also like the fact that my iPad has an illuminated screen. A couple of years ago we were singing in a very poorly lit choir loft and I was the only one who could properly read the score! The guys around me (all men schola) were craning their necks to try to read off my iPad.
I have my iPad in a (fake) leather case, so when I use it, it looks like I’m holding open a book. I’ll never go back to messing with paper.
But, otherwise, for liturgy I still use paper misallettes, and my now well-worn Graduale Triplex. I suppose I could get the readings off the 'net, but for the Graduale, there’s a lot of flipping back and forth from the Propers to the Ordinary (and the Commons for saints), and that’s less convenient with an iPad especially since the only known scan of it that I can find, is just a series of image files, not searchable, and you can’t bookmark properly as a result. For choir use I simply arrange the score sheets into the order I’ll need them.
However, no fair responding to CAF posts during the sermon.

If the sermon runs past 8 minutes, I reserve the right to respond to CAF posts

(just kidding!)