The late-night talk TV world Letterman leaves behind is packed with capable hosts on many networks, but what they preside over, strictly speaking, is neither talk TV or late night. This collection of hosts are mostly feel-good, up-for-anything entertainers, not the wry, leery talker Dave perfected. What they hosted, more like variety shows, are available for playback any hour of the day, either whole or parsed out in digital snippets.
— Frazier Moore: David Letterman leaves late night with thanks and a smile