TNG, with the Moriarty episodes, seems to imply if a hologram exists the holodeck, they get deleted. But Voyager’s EMH constantly gets turned off or disrupted (more so after getting the mobile emitter) and is otherwise fine.
I have mind-canon for this: on Enterprise D, Miles O’Brien was relegated to transporter duty, and Commander Broccoli was their Holodeck expert.
So I figure that the Holodeck on Enterprise D was running without even basic backups, much less a thoughtful disaster recovery plan.
Voyager, in contrast, at least had the recycle bin enabled.
Also, we all know, in our hearts, that there’s a macro on Enterprise D that wipes the entirety of Holodeck history, each time Broccoli closes a program.
I have mind-canon for this: on Enterprise D, Miles O’Brien was relegated to transporter duty, and Commander Broccoli was their Holodeck expert.
So I figure that the Holodeck on Enterprise D was running without even basic backups, much less a thoughtful disaster recovery plan.
Voyager, in contrast, at least had the recycle bin enabled.
Also, we all know, in our hearts, that there’s a macro on Enterprise D that wipes the entirety of Holodeck history, each time Broccoli closes a program.
The history isn’t the only thing that needs to be wiped after Broccoli is done in there.