I do iOS development now, and I spent the 90s doing NeXTSTEP/OpenStep. I still own two NeXT machines.
The main differences now are 1) cheaper, faster hardware, 2) menubar at the top instead of a floating vertical menu, 3) I keep the Dock on the left instead of on the right side of the screen, 4) fancier development tools.
The main differences now are 1) cheaper, faster hardware, 2) menubar at the top instead of a floating vertical menu, 3) I keep the Dock on the left instead of on the right side of the screen, 4) fancier development tools.