For me it's either when I find the included RAM is too small (as apps grow over time) or when the flash memory degrades to a noticeable degree, or when the camera loading takes too long.
I'm sure I had it many years before this image from 2016 - it's always had a place on my home screen since the original Galaxy Tab 1. (which is still going today as an SMS device at a radio station.)
We're supposed to be getting a rail trail soon. Train line hasn't been used for more than 30 years. New England, NSW.
The train folk aren't happy about it, but I can't see the government spending billions to open a badly decayed line when one already exists two hours away along the coast, and they're already building another one on the plains not too far away.