There was some talk about Salt not being very active as a community, I guess, that changed during the last 1-2 years? Ansible can be a lot faster/ efficient with Mitogen https://mitogen.networkgenomics.com/

E.g. seznam.cz (a Czech search engine) migrated from Salt to Ansible, they seem to cope ok. (There is a PDF from the LinuxDays talk last year.) Google Docs can translate PDFs even from Czech into English: https://pretalx.linuxdays.cz/media/Ansible.pdf