I only wear a kilt when I'm performing on the pipes somewhere, or attending an event where a certain level of dress is expected, due to not having owned a suit in over 20 years.

For daily wear it would be impossible, because I have to wear slacks and shirt and tie every day at work.

For ordinary casual dress Highland Dress doesn't make sense for me. My Highland outfit cost around $1,000 (even with the jacket, sporran, and ghillies bought used) and I'm not going to subject it to daily wear-and-tear. It's the equivalent of an expensive suit or tuxedo and I treat it as such.

It being Southern California, daily year-round casual wear is Cargo Shorts, sandals/flip-flops/zorries, and t-shirts. When it gets a bit cold I wear socks with the sandals and throw a light jacket over the t-shirt. It's how it is here.