Agreed. I have had a Boss DD-20 for ages. Can be set for the second pedal to be tap, or use an external tap ( I use a keyboard sustain pedal as the expansion). I have never gotten a bit of gas to replace it, and will never replace it for one without tap.
MIDI sync might be nice too, but my delay trails are never long enough to warrant the setup/cost of such implementation. The tap method is close enough for use.