The problem is many of these antennas are tuned for ham freq’s of foreign countries. Not US bandsplits. You also have to ask yourself why do commercial users like police, fire rescue, utility companies buy Larsen, Laird, Antennex, etc. Diamond /Comet May be fine for applications in Fantasy Land where hams treat their equipment like gold, but in the real world where users don’t give a crap about their equipment, these antennas wouldnt last a day. That being said, I own a Larsen dual band that’s 25+ years old. And my Dad has a Diamond 7500 that’s also 25+ years old. But we both are now using Laird low profile antennas so we can get our cars into the parking garage.