Why is it not possible to change plan specification(Ram,CPU,Disk) in SolusVM 2.0?

Question

Why is it not possible to change plan specification(Ram,CPU,Disk) in SolusVM 2.0?

Answer

Inability to modify plan specifications is by design.
Plans are bound to VPSes created with the plan.
And in case there are VPSes created with the corresponding plan it will be necessary to resize all those VPSes accordingly.