True. One caveat though. Before someone rushes to purchase bagfuls of these chips on Aliexpress/Ebay/Amazon etc, it should be noted that the sellers are perfectly aware of those chips popularity among guitar effects builders, therefore they're among the most faked items over there. If you're extremely lucky you get the real thing, which doesn't happen often, or if you're moderately lucky you get a smaller version or a rebadged clone (resulting in shorter delays or louder noise, or both). If you're totally out of luck you get common cheap random chips relabeled as BBD delay chips. This happens very often with pricey chips when shopping online on those platforms.

However, the BBD sound can be almost easily emulated in digital. On the "wet" return line of a digital delay put a N dB low Q high pass filter before say 200 Hz, a N dB low Q low pass filter above 6-8 KHz, add some gentle clipping and some noise, compress overall wet dynamics and feed the return back to the delay input. Then adjust delays, feedback and filters amount to make it sound like a real one. The trick is simulating the progressive way in which the sound when going through a BBD device will lose in fidelity while getting more distorted and noisy, so we filter and add those artifacts inside the feedback path.