I believe Ubuntu started being usrmerged-by-default in 19.04 (Disco Dingo), although the release notes do not mention it. On 16.04 you can usrmerge your system

I believe Ubuntu started being usrmerged-by-default in 19.04 (Disco Dingo), although the release notes do not mention it. On 16.04 you can usrmerge your system by installing the usrmerge package: https://packages.ubuntu.com/xenial/usrmerge https://packages.ubuntu.com/xenial/usrmerge