Why does the initialization of Tabular have to be in 'common' code?

Could I ask why initializing the Tabular instance has to occur in a .js file that is run both on the client and server?

Locate the common .js file that initializes the Tabular instance and trace where it is loaded on the client and server. Read the surrounding initialization and package entry points first; done means documenting the reason for the shared initialization or identifying a clearly scoped change, with the explanation supported by the code.

Written by the indexing model from the issue text.