I think the S and X (and Roadster) sold less because they were expensive early models trying to create a "premium" halo-effect (if so, they succeeded).

For range, how much range is sufficient? This may be one area where the EU and US need fundamentally different vehicles, as per the saying "in America 100 years is a long time, in Europe 100 miles is a long way". Certainly the EU market supports B-segment with 44kWh @ 320 km / 199 miles: https://en.wikipedia.org/wiki/Citroën_C3#Europe_(2024)