Does it? What does the 64-bit mode provide that the 32-bit one doesn't? On x86 things were different because the 64-bit ABI also provided access to more registe

Does it? What does the 64-bit mode provide that the 32-bit one doesn't? On x86 things were different because the 64-bit ABI also provided access to more registers and other benefits, but as far as I know, the 32-bit mode has the same features as 64-bit on ARM. This reminds me of when the UltraSPARC CPU's came out. I was working at Sun at the time, and I remember asking why Solaris 2.6 was released without 64-bit support. The reason was the same, there was really no benefit to it (except for support for more than 4 GB of RAM in a single process, which wasn't really needed back then). Even as later versions of Solaris came out with native 64-bit support, the entire userspace was still 32-bit because it worked on both architectures, and the binaries were both smaller and also faster.