User blog comment:Alartan/Swiftness or Mobility boots?/@comment-25003900-20150203162951/@comment-4022742-20150206084750

@Chaos Ticket; So swiftness only takes effect if you have 440 MSPD against thresh ult. Just goes to show how strong the Swiftness effect really is, seeing as even the slowest champion gets 385 movement speed. Getting even 1 movement speed multiplier will topple that 440 mark.

By the logic that boots are unpopular because they don't increase damage everyone would get Sorcs & Zerker, the only boots that increase damage output, which just isn't true.