Well, yes. Those who practice TMAs tend to be far more concerned about historical and cultural reenactment or preservation over martial proficiency. Look at how many TMA practitioners scoff at Mixed Martial Arts or Bjj for example. Nevermind that both MMA and Bjj have proven their effectiveness over and over again in several venues, which is partly why they're inching out many TMA schools around the world.
Its the same attitude that many traditional Jujitsu schools had towards Judo, ignoring the fact that Judo proved its effectiveness in several venues while many Jujitsu styles hid in the shadows and pointed fingers. I didn't see too many Jujitsu schools step up and take on a boxer like Gene Lebelle did back in the day. I didn't see too many Jujitsu schools step up and participate in NHB competitions like Vale Tudo like the Gracies did. No, its not about martial arts, its about retaining those ancient, mystical Asian practices because people think they're "magical".
The reverse punch is a prime example. Why train it over and over again? I've never seen anyone use it in a fight, and it simply isn't practical. Boxing/Kickboxing has given us far more practical and useful punches. If the goal is to train someone how to punch, why teach the reverse punch? Why not teach them general boxing techniques? By the same token, why are we wasting time learning katas when time would be better spent learning footwork and evasive techniques from boxing/kickboxing?
Keep in mind; It isn't always about age, its also about the mindset. Aikido is a pretty young art, but I would still label it a traditional MA because it has all the trappings of a TMA. Some Karate styles, Okinawan, Japanese, and Korean, would fall under that umbrella as well. Numerous older Jj styles would definitely fall under that label, especially the ones that revolve around weaponry. Iado is another one. Numerous CMA styles would definitely be considered TMA, and so forth.