I didn't say it's a bad idea, i said it's a matter of fact that software exists that runs in /opt/ and that sometimes there are reasons to do so. For example, a

I didn't say it's a bad idea, i said it's a matter of fact that software exists that runs in /opt/ and that sometimes there are reasons to do so. For example, a particular usecase is to have a specific mountpoint that holds shared binary and configuration in a cluster environment that can't be mixed with native applications and configuration files. Also sometimes you don't have the user rights to install in /usr or policy forbids to install 3rd party software in /usr. /opt is the usual way to go then.