It's a bandwith vs latency issue. Imagine you make 5 commits in 4 hours. You now have 5 builds queued up and 20 hours of latency. So one would probably prefer

It's a bandwith vs latency issue. Imagine you make 5 commits in 4 hours. You now have 5 builds queued up and 20 hours of latency. So one would probably prefer to only build the last commit, and maybe queue the older commits up for later. But if you make another change then you'd need to pause the build of the older commit, or you'd be at up to 8 hours of latency instead of 4..