Drawbacks of Monolithic Blockchain

High chances of failure Since all nodes are integrated, a failure in the area of the system can affect the entire chain. 

Flexibility Monolithic blockchains are inflexible and this is because all nodes are closely integrated.

Reduced Blockchain Efficiency Reduction in efficiency is associated with the limitation of node resources.

Scalability Scalability is the ability of a system to accommodate growth and increasing amount of work effectively, without compromising efficiency and output.