I think this depends on who you listen to, but I'm a huge fan of the monolith and wouldn't break one up unless I has a specific tech need(eg some weird library)

I think this depends on who you listen to, but I'm a huge fan of the monolith and wouldn't break one up unless I has a specific tech need(eg some weird library), a performance issue unaddressable in the monolith, or big organizational people problem and in that order.