Only slightly related, but for people who want to test breaking/working sites on both ESR78 and ESR91 (or any other version), there are Portable packages (for Windows) of all legacy ES releases available at:
Only slightly related, but for people who want to test breaking/working sites on both ESR78 and ESR91 (or any other version), there are Portable packages (for Windows) of all legacy ES releases available at: