If bottom discrimination is a big focus item for a B260 customer, the FCV627 and FCV587 are available and support it. The suggestion has been placed for the GP1870F/GP1670F but doesn't mean that it will change. The GP1870F GP1670F are very low cost/value units. I don't recommend ANYONE buying a unit with dreams of features being added in the future; in hopes of saving a few bucks. If the feature is important then buy the unit that offers it; or the transducer that does support that feature on the GP1870F/GP1670F.
Unlike many companies we offer free updates and support the product for many years with parts, service, and tech support. We have won the best in support from NMEA since the award was created. We are proud of our products and what we do. I am sorry the unit makes you unhappy but it offers exactly what has been advertised. If you would rather have purchased the FCV587, and you are a Furuno USA customer within our sales and support area; please contact one of our managers. I am sure we can work out something where you can pay the retail difference and change over to the unit more fitting of your needs.