Wire wheels are just fine with me. In 54 years, I've had one bike with cast wheels and one of them cracked and needed a very expensive replacement. On the other hand, in all that time, I've replaced a total of 4 spokes. All of them on a bike with over 200K miles on it, most of those miles were put on at well over the speed limit.
Oh yeah, about the cost. I got a full set of new spokes for around 30 bucks, so I fixed the bike 4 times for a whole lot less than one fix on that cast rim POS.