I'd love to have this plug-in installed, as it's a huge time-saver. I wouldn't vouch for the smelting into stained glasss (which can be disabled!), but I think that being able to reverse the concrete into its powder form is a feature that's not entirely useful, but one of those features that's a pain when you need it and don't have it. Mainly, I hate spending time at a concrete mixer, and would rather streamline the process and get back to building ASAP.
https://www.spigotmc.org/resources/betterconcrete-1-13-x-1-20-x.58276/