Laptop will sit on the piano and Roland, but small screen and no vertical orientation and no pencil. Sticking with the MBA 2010 model.
Also, prefer to read on it. Less distraction than the monitor+Mac (there's always something distracting lying about), save notes for talks, for writing (the portability factor)
AND show off best photos I transfer from the camera/Mac. Size matters when editing. I don't take a laptop to friends' homes, and as above, it's not awkward to rotate.
I scripted more than programmed, so I loaded up a-shell, Processing, Carnets (Jupyter) and a couple of Basic interpreters in case I have to knock out a calc in a hurry. For CAS, I chose PocketCAS over MathStudio for reasons I forgot, but have not used CAS in ages. a-shell looks to be a complete unix environment, TeX and all.
When I get time. Brahms and tonight's sunset won today.
Friend who taught at medical school uses Notability a ton.
I love Pages because unlike any other app, I can scroll to my heart's content without ever entering EDIT mode by default. To EDIT, you have to hit the EDIT button. (and v/v) It's sheer genius. I often programmed an EDIT button into Hypercard text fields for just that purpose. It's just an outrage to scroll through anything and enter edit mode by mistake. 20 times a day (Evernote?) and then undo accidental edits.
Honestly it was mostly a media consumption device until I got the Magic Keyboard (the one that's a case w/ keyboard + trackpad). Now it's like a somewhat crippled 13" Macbook Air but I use it a lot more for "productivity". With that case it might be heavier and thicker than the M2 Air.
It used to be good when I wanted better battery life than my MacBook, but my M1 MBP beats the iPad on battery now.
I get some good focus due to the iPad almost forcing you into one application at a time. If I even tab away from the terminal to a browser window, there's a good chance I'll loose my session and have to reconnect + tmux attach. So I mostly multi-task by looking things up on my phone.
For being productive, I use Blink as a terminal and do a lot of coding + sysadmin that way. I use Inspect Browser to get a lot of the browser dev tools you're missing on iPad Safari / Chrome. I use Trello for a lot of project management but bleh on the UI these days. I don't use it enough but Goodnotes is a good paper notebook replacement especially if you have a Pencil and get into using lots of page templates. I should draw more in Procreate but I don't. I keep a ton of notes in Apple Notes. I read a ton of books on the iPad and it's a great size for technical books.
I do use it side-by-side with my MacBook Pro, usually in Universal Control where the Mac's kb/mouse can control the iPad UI or vice-versa, but sometimes in Sidecar where it acts as another external monitor for the Mac.
But yeah a lot of the time it's a big video player, mostly Plex but some YouTube and Netflix.
Also perhaps music, since Logic Pro is now on iPad. But even then I think it would only be good for traveling, I'd rather have a big desktop hooked up to a keyboard at home.