@kenshirriff @gilesgoat I have several BBD delays in my Eurorack cases that would disagree. ;)

BBDs have a particular charm over digital delays, and have specific feedback characteristics to boot, which make them very popular. I think these days there are double digits of brands that make a BBD delay module.

The PT2399 chip is what is used in the lion's share of these modules. I have several in my own collection and have designed my own delay circuit with it! BBDs are also perfect for karplus-strong synthesis.

So I suppose for most purposes the BBD is not the delay of choice, and it's definitely not the cheapest. But it is alive and well in the PT2399.