A number of smaller businesses to just one?

[Undirection]

Have any of you started off with more than one business and then, as time has gone by, you've found one outstrips the others and you've sold/ditched the others along the way to focus on just one? I am not sure this will happen to us but we have 4 currently running pretty successfully but one may soon (IT sector) require a serious amount of dedication and work and so we may need to make the decision to focus on that one.