has anyone had any problems with excessive oil consumption?
Yes , some people have.
Well, yes and no. Prii (the plural of Prius, according to Toyota) of certain vintages do have an issue with oil consumption but usually well after 100k and about a quart in 1,200 miles or somewhat more. In other words, yes, a problem but normally not exactly a calamity if you check the oil regularly.
Sorry but that’s worth repeating !