I disagree. It's more a police discipline (police in many countries learn it), because boxing is not something that a police officer should do when he needs to quickly disable a bad guy.
Also as Bruce Lee said, it doesn't matter which exactly MA discipline you learn, because the only important thing is HOW you do it.
As an example, my son has a brown belt in Aikido. When he decided to learn other disciplines, he started with Kudo and after a half of year he went to a Moscow MMA Kudo championship championship held by GRU (yes, that
GRU ;)) veterans and won 2nd place there. And yes, he used his Aikido skills. He has defeated his partner with a painful reception on the floor in the final fight. He didn't learn that technique in Kudo. He learned it in Aikido.
Perhaps there is a difference between classic Japanese Aikido and Aikido with national specifics. Aikido in Russia is not the same as Aikido in Japan. For example here they actively use punch technique. Just as a funny fact, the boy has broken my right rib when he was only 16 )
Also when my son went to university, he started to learn Sambo and it was easy to him because of Aikido background, since these styles have a lot of same wrestling techniques. He has learned Sambo for yet 5 more years and Aikido was always helpful.
If you say it doesn't work on the street, you will be wrong again. My son has a rich background in street scuffles. First time he has came home with a knife cut on his palm when he was 12 or so. And honestly, if he didn't learn Aikido, that fight would turn much worse to him...
P.S. Don't know how come, but Steven Segal is a Russian citizen
