Does reconciliation work get more fragile as finance teams rely on more systems?

As finance stacks grow, teams end up reconciling across ERPs, billing systems, payment processors, and internal tools. What used to be a single ledger problem now feels like a cross-system coordination problem, where small differences cascade into bigger breaks.

Even with controls in place, a lot of reconciliation time seems to go into understanding which system is the source of truth in edge cases. Some teams I’ve spoken with use tools like Collatio Accounts Reconciliation software to centralize matching logic, but the underlying challenge of system fragmentation still shows up when processes scale.

For people in corp fin or controllership roles, do you feel reconciliation work has become more fragile as the number of systems increased? What has helped the most: process redesign, system consolidation, or better tooling?