All. the. time. I have hoopla for Ebooks, Audiobooks, Videos, and music. I do love to hold a book in my hand so borrow them from library, and if the library doesn't own the one I want they will do an inter-library loan.
I have cards at two libraries and nearly exclusively download library books to my Kindle. I mostly only read at night before going to sleep, so it takes me a while to get through a book. I would never get an actual book back to the library by its due date. An e-book will remain on my Kindle as long as I keep it in airplane mode.
I only use the library for my books, I found them way too expensive to buy. I will sometimes buy books from the thrift shop but not often.
I use them all the time. We have an interlibrary loan system in our county. If my local library doesn't have the book I want, then they will order if for me from other libraries in our county system. We also have e-books and audio books we can borrow from the library app. I haven't used the audio books often but recently, I'm finding that they are available quicker than the book or e-book.