This may just be me being idiosyncratic with vocabulary.
To me, "less viable" implies there some outside factor or internal failure preventing it from working. But non-internet appliances will continue to work just fine, if you can get one. I.e. it's a viable choice, just one with less and less availability.
To me, "less viable" implies there some outside factor or internal failure preventing it from working. But non-internet appliances will continue to work just fine, if you can get one. I.e. it's a viable choice, just one with less and less availability.