Exactly this. Things like payroll integrations and benefits administration are not obvious and straightforward at any large company. For example, even common

Exactly this. Things like payroll integrations and benefits administration are not obvious and straightforward at any large company. For example, even common things like international transfers or leaves of absence can trigger manual processes at companies that don't have software to do it for them. Integrating with ADP is easy, but figuring out the business logic and process re-engineering is tedious. It's exactly things like this why I think most programmers and architects should spend at least a year or two working in a large corporation. They'll be exposed to all kinds of situations that just don't exist in a startup (or even most SMBs).