glejeune/homebrew — comment on commit 014857996615c9349455e227b97c76c60a70d016
File: Library/Formula/soci.rb line 9
By glejeune:

As you can see in the SOCI documentation (http://soci.sourceforge.net/doc/installation.html), it is possible to use it with or without Boost. So I think that it must be a user choice ;)