1. The city's electromagnetic environment is poor, and LED streetlights, small electric scooter chargers, etc., are all susceptible to shortwave interference.
2. The new B cannot exceed 15W, and combined with the reasons mentioned above, it significantly reduces SSB and CW communication, making it difficult to enjoy these modes. While digital modes like FT8 are feasible, they still can't match the enjoyment of voice communication.
3. Some individuals become "HAMs" purely out of enthusiasm, bandwagon effect, or a desire to emulate others ("If they're doing it, so can I"), and their interest quickly fades.