About Linux... Linux is a core only. For historical reasons, the investment into it in terms of IP and money was huge. The number of people which "tweak" it is small.
What people call "Linux" is one family of OSes which is based on this core (another family is Android, but no-one call Android "Linux", yet another family are consumer devices like TVs/receivers/etc., but most users do not even know they have Linux at home...). Since most software for Linux OS is open source, it is more tweak-able then let say Windows by definition. But most of usual tweaks are the same as in other OSes...
I mean I see not too many similarities between Linux (as a core or as an OS) and Reaper.
Described operation (copy by dragging) has many options. So it can work exactly as someone need it to work, but when someone try it for the first time, it does that "wrong". I think that is primary concern for anyone who does not like the freedom