I hear you about the keyboard. Not the worst, but definitely some finger cramping after extended use. The saving grace for lack of any tactile feel was the console beep generated with each keystroke. At least I could still type in my programs without having to look back at the screen to see if it registered.
I also remember my first storage device with my 400. Prior to obtaining a 410 data recorder, my first storage media was a spiral-ring notebook. Wrote all my application and gaming code into it after I completed each program. Then I could type it in again after powering down or playing other games. Needless to say, once I typed in one of my own games, I spent as much time as I could enjoying it, given the time it took to type it in the first place. The 410 concluded that era for me.
For the 410, I usually purchased the Radio Shack tapes that looked like reel-to-reel, so it had that mainframe/mini tape subsystem feel, or how I imagined it then (Ended up working on actual tape subsystems for two HP 3000s - a 52 and a 925 - during my university summer and Christmas breaks for a local company).
That was all put behind with the 800XL (a real keyboard) and the 1050 disk drive. I still picked up a 1010 tape drive to migrate my programs to disk - and, as a kid, I still liked running those tapes with the reel-to-reel look.
With my current 800, I have an 810 disk drive and 850 interface module, but those tend to stay safely tucked in my vintage hardware cabinet. I spend more time using the SDrive-MAX drive emulator, mounting up to 4 virtual drives at a time (after tweaking DOS to allow for the 4 drive devices). Beside being much faster, I can move virtual floppy disks between my 800 and my Linux laptop, running the Atari800 emulator. This also allows me to experiment with cross-development tools to write Atari code from my laptop like CC65 and ATASM.
The 850 still gets pulled out from time to time and attached to a Wyse PowerTerm device (running OpenBSD over a serial console) so I can connect my 800 as a terminal to the online vintage systems still in operation at the Seattle Living Computers Museum. I found Chameleon from APX works rather flawlessly for the task.
It is amazing what can still be done with these machines from our past.