Restoring app last state? Like terminal emulator recreating tmux session wrapping screen session with package manager working under sudo? SSH unHUP-ing processe

Restoring app last state? Like terminal emulator recreating tmux session wrapping screen session with package manager working under sudo? SSH unHUP-ing processes on remote machine? Python VM resuming all scripts in a precise place and state they were stopped? The problem is that there is no such thing as isolated "application" on Linux or any other real OS.