We recently converted a large folder of recipes (with many subfolders) to Pages (and some PDFs) and keep the folder in iCloud. That way we have recipes available in the kitchen for instant referral and, importantly, modification. Previously the recipes, accumulated over decades, were in a hodgepodge of Word, Pages, TextEdit, PDF. Mostly we didn't edit them except on the Macs.
Of course, they're all equally available on our Macs.
The iPad normally lives on a buffet adjacent to the kitchen, but we also have window sills large enough to hold the iPad securely and at an excellent height right next to the mixer and stove. (I built the sills for potted plants.)
The only downside is the streaks of butter and shortening that get on the iPad. But Wipe 'n' Clear fixes that.
We took the iPad on a trip to Mt. Rainier summer before last, and it functioned well as a laptop (email, reading news) wherever we had WiFi. It didn't function as well for photos, as it appears you cannot download only some photos from a camera card. It seems as if it's all or nothing when you connect the card.
We have some Science/Nature apps: Molecules, The Elements, Molecules, In Action, iBird Plus, Sibley Birds, Reptiles and Amphibians, Insects&Spiders, WA Flowers, etc.
Lots of iBooks on the iPad, and I do a bit of reading on it. We also read a lot of news on the iPad: New Yorker app, New York Times, Washington Post, and Apple News.
I'm a long-time fan of Tintin, since the days when our children were young, and have all of the available albums (English) in the Tintin app. The images are beautiful, but unfortunately they're all new English translations which are inferior to the original American editions. http://tintin.eugraph.com
We also have used the Art Authority app quite a bit. This is probably much better the larger the iPad.
I bought a number of drawing/painting apps, to see which one I liked best (Procreate), but haven't spent the time I need to with the Apple Pencil.
Morpholio Trace, Paper, Concepts, Notability, ArtRage
"Design is not just what it looks like and feels like. Design is how it works."