Why would you even want to consider it?
GO 4 has been stable for almost 4 years.
All this can do is break a perfectly good, sandboxed system!
If it ain't broke, don't go fixin' it!
Different battery specifications in the same shape battery case. A recipe for disaster. There was a thread on the DJI forum where someone ran out of mini 5 pro batteries so put a battery in from either a 3 or a 4. It didn’t end well for the drone.
There is a way of using Litchi Hub to plan waypoint missions and then upload the generated mission file to the device running Fly. Have a look here How to use Litchi Hub with DJI Fly (for drones with no SDK support)
Here is a quick compilation video of just some of my least finest moments from the last 5 years . Yes , some will say they many of these were caused by seeking "low value shots " . However , the value of the shot is dependant on the person...