> I am wary of installing anything on a Debian machine that I can't just get using aptitude (sudo apt-get install foo).
I don't think that is really an issue (anymore?) - I've installed deb packages manually and compiled stuff from scratch. The only problem you could run into is if package A from the Debain repos requires Version X.1 - but you installed some random deb which installed Version X.2 - you might get into dependency issues. I've found backports to fill this gap.
In fact the Jetbrains stuff is self contained so you need to bring your own JRE and run it from the folder that you extracted it to.
I don't think that is really an issue (anymore?) - I've installed deb packages manually and compiled stuff from scratch. The only problem you could run into is if package A from the Debain repos requires Version X.1 - but you installed some random deb which installed Version X.2 - you might get into dependency issues. I've found backports to fill this gap.
In fact the Jetbrains stuff is self contained so you need to bring your own JRE and run it from the folder that you extracted it to.