What surprises me the most is the 1GB option is even viable though I can imagine this will be for IoT users who shove Pi's into things doing embedded stuff where a kernel with a few user space things along with maybe a container are doing all the work.
I have a Pi3b in a 3D printer, and compiling the software, but also simply apt upgrade feels like it takes forever. Most day to day operations work just fine though.
At work we have a display with a Pi3 (not B) connected, just showing websites in rotation. Websites even with a simple animation are laggy, startup takes a few minutes.
Both of these usecases don't need more than 1 GB of ram, but I want to speed of a 4 or 5.
Usually it's just "same thing but faster". CPU is 2-3x faster, and even boot speed is faster, so it can be handy to not have to wait so long to run updates, compile something, reboot, etc.
> What surprises me the most is the 1GB option is even viable...
There are plenty of non-IoT use cases that are viable with 1GB of general-purpose compute. Hell, I rented an obscenely cheap 512MB VPS until recently, and only abandoned it because its ancient kernel version was a security risk.
Most of my RPi tasks are not memory-bound