Check to see if the filter and pump are clear from debris, also make sure the drain is in a high loop on the sink side many times the loop fell down and the water will siphon back down into the DW after the cycle runs. That is 50% of the problems I see. Worst cast its a bad pump..
Many brands went away from this for safety concerns , energy efficiency and overall design to offer more space they relocated the element. There are many different drying methods from condensation dry to air dry to Bosch new crystal dry. End of the day in my humble opinion nothing dries better than an heating element on models such as the kitchen aid 604 and up series. They have fan assisted pro dry as well and get hot! your plastics come out dry. Efficiency on the other models makes no sense when you need to just end up drying by hand or running the cycle over!
It is worth the extra cost. The GE will hold up better be easier to get parts and repairs. It is a more reliable brand especially for a large family. The icemaker is in that spot so it frees up the inside and it will perform better. Frigidaire decent but lacks a lifetime of quality many people complain of easily broken plastic parts etc. spend the extra on the GE its worth it.
Pros are you get the best of both worlds. Quick responsiveness of a gas flame and even clean heating in the oven with electric. Many cooks prefer electric for baking. The cons are the expense , limited available models and needing both utilities. Many new stoves come electric induction so those have become increasingly popular over the dual fuel models as induction tops respond faster than a flame and offer better heat control.
So it is not required on these models. Units without built in Air Fry like many of the older Cafe models require the app to use/ download the newest features. Wifi on the models you mentioned are just for remote monitoring and controls of the oven. You should be golden, I have wifi on my dishwasher never hooked it up never felt a need for it plus my wifi is slow as it is why bog it down more!
not sure if you have the exact models as those panels look awfully close to me? if anything the 9800 seems to have the newer panel. I just did the 5 n1 cafe and it has the full color panel easy to read and use. I don’t know of any panel changes on the horizon for at least 12-16 months.