I think we've gone back on forth on this over the years. The rate of new services is decreasing, so I think we have shifted more from lots of very small services (low thousands lines of code) to bigger ones that are more like an entire product (e.g. 100k LoC+). But I wouldn't be surprised if the pendulum shifts back again in the future - there are downsides with the larger services, like greater contention withe other engineers.