[winrid]

So is 1000 people trying to coordinate package versions and interface changes across 100 systems (throw in loosely typed languages for extra fun).

[robertlagrant]

That assumes all services talk to all other services directly. a) they probably don't, and b) message busses can help a lot.

[dodobirdlord]

APIs shouldn't change in backward-incompatible ways. That's sorta the bedrock of a service oriented architecture. If teams have to communicate with each other through more than API documentation and can push responsibilities onto each other by making backwards-incompatible changes then you've kneecapped the entire benefit of a service oriented architecture from the get-go.

[winrid]

I'm not talking about backwards compatibility so much as adding features in parallel that span many services, which happens when you're closing a lot of sales deals when the salespeople don't say no to things :p