The iPad Pro 12.9" 4th Gen "earns a 3 out of 10 on our repairability scale (10 is the easiest to repair):

The USB-C port is modular and can be independently replaced.

The lack of a physical home button eliminates a common failure point and may simplify repairs.

The battery is secured with both easier-to-remove stretch-release tabs and conventional, non-removable adhesive.

The LCD and front panel glass are fused together—simplifying the opening procedure, but increasing the cost of repair.

Gobs of adhesive hold most everything in place, making all repairs more difficult.