I own a lot of physical cookbooks and I own kindle cookbooks.
Some of my favorite recipes has consistently come from good cookbooks. They’re generally more carefully cultivated and tested.
I’ve been cooking through Paul Prudhomme’s Louisiana Kitchen cookbook and even with the Spartan features of an old book the recipes are insanely good. It’s just hit after hit.
That's not to say you can't get good recipes online, I just find the signal to noise ratio much worse than books.