Whenever someone tells you: “Why do you need so many partitions? There's no reason to have more than a root one, another for /boot and a third one for swap. And even that may be overkill.”, just reply: “I know this guy whose ass has been saved many times by having separate /opt, /usr/local, /var/log, /var/www, /root and /home partitions, so, when things went wrong and he was forced to reinstall, the data on those partitions was always safe.”
Seriously, it makes no sense to me to have essentially _no_ partitions. That seems to me like Windows thinking.
@josemanuel I also know this guy who has corrupted his configs by reinstalling around a static home partition indiscriminately