Ultimately we decided that the convenience for users and documentation of a single location outweighed the benefits of following the basedir spec, particularly when deployed across operating systems. We looked at other tools, including terraform [1], in reaching a final decision. FWIW, we do let you customize the location of the "install dir" [2].
Hopefully the benefits of Steampipe outweigh the "peeve" factor in this case <grin>
1 - https://www.terraform.io/docs/cli/config/config-file.html 2 - https://steampipe.io/docs/reference/env-vars#steampipe_insta...