Sure. Just look at all the effort put into new-fangled APIs that no software uses because they don't want to be tied to a specific version of RISC OS. Look at all the ripping out of stuff from the kernel into separate modules that from the user's perspective just makes *mo. confusing.
Here are a few others that I believe next to nobody uses;
* Firewall and aliased interfaces,
* PCX, PNM, XBM, SunRaster import in Paint,
* Additional keycodes for multimedia keyboards,
* Built-in command line zip tools,
* Hardware profiles,
* Multiple user accounts,
The list goes on. I'm sure somebody outthere uses those hideous "curved" buttons and graduations to make an elegant and understand GUI as blingy as a souped-up Nova. However, the features that make RISC OS 5 different from ROL's offering are the ones that are most appealing;
* A HAL that appears to be easy to work with,
* Built-in USB,
* PCI support.