Even if you get the source youbend up with incompatibilities. From compiler to libraries. (Especially when reaching GUI/Gnome etc.) Systems like Solaris are a

Even if you get the source youbend up with incompatibilities. From compiler to libraries. (Especially when reaching GUI/Gnome etc.) Systems like Solaris are a lot more restricted what sets of libraries they provide (not "package up everything in the world" as some linux distros) but what they provide they keep working. (I haven't touched an Solaris system in a long time, but assume they didn't start massive "innovation" since then)