Maybe you can confirm why the 6110 WLL Vanatge Vue ISS is a discontinued item?
TBH You will need to ask Davis. But my take is this: A year or two back, Davis went overboard in starting to offer bundles of items that were already available as separate components, and the 6110 Vue bundle is one such example. Maybe the slow bundle sales didn't justify the extra costs at Davis, or perhaps Davis took note of pushback from some dealers complaining that there were starting to be too many overlapping products to hold on their inventory. If you need to hold significant numbers of 6110 as well as 6100, 6351, 6357 and 6250 then it adds materially to the capital tied up in stocks. OK, this is just one extra item but the principle is clear and applies to various other items too.
Bottom line is all the noises coming our of Davis suggest that both 6100 WLL and 6316 Envoy are going to continue to be available long-term, as will 6357 Vue ISS. So the equivalent of the 6110 bundle will continue to live on, even if the slow-selling bundle itself has been withdrawn.
Every year when the new price list is released (usually January), there are typically some new products and some rationalisation of slow-selling or superseded products. I don't think there is anything new to see here with 6110.
One last thought: If WLL and Envoy were ever both withdrawn then I can see sales of MBPro2 skyrocketing. It's not as if there is zero competition in meeting the demand from a subset of hobbyists for a device with a local API.