Well, with over 2100 built now, in the last 15 years or so, perhaps yoour feelings should be allayed.
151 United AL
(N) 55x A319, 96x A320
141 Northwest AL
(N) 68x A319, 73x A320
121 Air France (F) 3x A318, 39x A319, 64x A320, 15x A321
107 US AW
(N) 59x A319, 20x A320, 28x A321
100 Air Canada (C) 47x A319, 40x A320, 13xA321
81 America West (N) 32x A319, 49x A320
73 Lufthansa (D) 17x A319, 30x A320, 26x A321
67 Iberia (EC) 4x A319, 57x A320, 6x A321
61 British Airways 33x A319, 28x A320
50 JetBlue AW
These are just the top 10 companies flying the type, i don't think they would operate it , if it was a scarebus!
It is wider than the 737 type, more modern, and performance is pretty nippy.
I work on 737-400 & A320/A319 , and there are things i like about both.