I would add that, I would be very happy having Manager in form of AppImage as this would solve a lot of problems (single package for ALL linux versions and distros, no debs, rpms, tgz etc.). Manager is the only which is keeping me away from using Arch/Manjaro as AUR repositories contain outdated (17.4.*) version, I was trying to manually install dependencies (to get newer version of Manager), so had to compile libwebkit. That took entire night and at the end I could not run because of other unsatisfied (or broken - do not remember) dependency, but I just had no time to compile another one and quit.
Currently I am on Debian testing and it is able to install *.deb files with dependencies, debian unstable does not provide libwekit (because too old or unsecure?!), so I had to install manually. Everything went fine, but still - spent time searching, digging, downloading and installing.
AppImage is single self contained file with all required dependencies, it doesn’t interact with system files, so there will be no broken dependencies (with testing purposes I was successfully able to run QT5 Skrooge package on Gobolinux (3xy kernel, AwesomeWM, restructured system layout!!!) and no problems running and working. I highly recommend AppImage, it is easy to pack and does not require subsystem module to be installed and (like snaps & flatpacks).