I don't do Solaris projects since 2001, besides tweaking at home every now and then, but I would guess:
- ZFS
- containers
- DTrace
- The usual commercial UNIX stuff that is still being brought into Linux and BSD distributions, in terms of security and high availability
- Maintenance contracts (Oracle changed them though)
All the code that is using Solaris specific APIs, because like all standards, POSIX only covers partially what each UNIX system offers.
I don't do Solaris projects since 2001, besides tweaking at home every now and then, but I would guess:
- ZFS
- containers
- DTrace
- The usual commercial UNIX stuff that is still being brought into Linux and BSD distributions, in terms of security and high availability
- Maintenance contracts (Oracle changed them though)
All the code that is using Solaris specific APIs, because like all standards, POSIX only covers partially what each UNIX system offers.