I work on a project consists of tens of devs that continuously delivered applications for almost a decade, and I joined this team 3 yrs ago. At some peaks, ther

I work on a project consists of tens of devs that continuously delivered applications for almost a decade, and I joined this team 3 yrs ago. At some peaks, there were almost a hundred people. We still continuously deliver new features to the project every day. We bill by hours as a lot of people suggest in this thread. Which works pretty well. We also have flexible iteration plans, the clients can prioritize any feature that is important to them. If a feature does not worth it, it will likely stay in backlog forever. Most things are really smooth IMO, though explaining why technical stuff is costly/mandatory is really hard to deal with. Because both of us want the project to be an ever-green project, we need technical advancement, architectural extensibilities. It's so hard to even convince myself if I considered myself a non-technical person. Why do you need to split into services? Why things are not immediately synchronized after the splitting? Why do you need a job here, and what's a job exactly? At the end of the day, it seems when you are convincing people about things they've no idea, you really need to be trusted -- just like you kind of trust doctor, and being suspicious about witch doctors. To achieve this, it seems better first to be business-focused and solving problems to build trust and reputation, as some kind of credits.