Debian (and other apt-based systems) are the Lego blocks systems of the Linux world. If you install a service, the assumption is that you want it to run (if you don't want it to run, you can either uninstall it or deactivate it). Bootable / live versions tend to have more comprehensive lists of installed packages to allow for greater utility/flexibility -- though some (Knoppix) actually allow you to install additional packages (yes, booted RAM-only) into the booted system.
The is not the case on BSD systems (generally an integrated whole, though they've got package management) or RPM (poorer package management leading very frequently to a "kitchen sink" installation paradigm).
Yeah. RHEL's even got a package you can install to enable/disable postfix vs ... oh, whatever the default MTA is, I can't keep track (smail still? I know they've moved off of sendmail, right? Right?).
The is not the case on BSD systems (generally an integrated whole, though they've got package management) or RPM (poorer package management leading very frequently to a "kitchen sink" installation paradigm).
Yeah. RHEL's even got a package you can install to enable/disable postfix vs ... oh, whatever the default MTA is, I can't keep track (smail still? I know they've moved off of sendmail, right? Right?).