Sybase and Sybase-CT and MSSQL, oh my?

Hello, I can't help but notice that MSSQL, Sybase, and Sybase CT-Lib each have their own PHP extension. What I wonder if many people have /not/ noticed is that two of these extensions implement the same C API on different platforms (mssql targetted for Windows systems, sybase targetted for Unix systems), and all three implement the same database protocol on the wire. In light of this, would it not be to everyone's advantage to consolidate developer efforts and merge the ext/mssql and ext/sybase modules? (Providing appropriate PHP_FALIAS wrappers for backwards compat, of course.) I can't imagine that there is so much difference between these two codebases that we need one extension with a .dsp file and one extension with a config.m4 file. Are there other reasons why PHP developers would prefer not to combine these two extensions into one? Regards, Steve Langasek postmodern programmer