Proposed change Turt to solve many many issues. In theory - you would never have to even store inventorys.

no-inventory-switch-gamemodes: true / false

if you are in survival - you must - have an empty inventory to switch into creative.

I can only speak for myself.. but I think this would solve a ton of unresolved issues.

I don't quite understand what you are asking for. What is the objective behind this? Forcing players to have empty inventories is kinda not what I want to do to resolve a bug.

to this day - it is still possible to dupe. Always by having items in survival - switching to creative (or being forced into survival) from creative or dieing while before using creative. You have fixed many! But they always crop back up (death drop from height, crazy ;)

Since dupes have existed as long as I have used this - this change would solve it in theory. By having it in the config and by default OFF - nothing would change for anyone.

I support this as it has given me a lot of issues as well.

Turning off the option would also raise a lot of questions from any new users.

I may be interpreting this wrong, but from what I can tell you are looking to have the gamemode inventory feature OFF by default?