Having worked extensively with some of those non-GNU Unixes, I feel that the difference is almost academic. Even if your box comes with nvi rather than vim, it

Having worked extensively with some of those non-GNU Unixes, I feel that the difference is almost academic. Even if your box comes with nvi rather than vim, it probably still has Perl, and the bash shell is likely installed if not set as the default. Overall, the feel is not that different.