Are exotic speaker cabinet materials overrated?

@gdaddy1 thanks for the details. you do this when you have 5 sides of the cabinet glued and b4 the crossover instal?

also my son and I recently put together a Parts Express C- Note and decided to cut our own 3/4 inch BB in lieu of the 1/2 inch mdf you can get if you order the cabinets. 

I would think that availability is a significant concern for those using exotic woods. A guitarist friend of mine who was a performance major at CCM, had a Brazilian Rosewood guitar. It was the envy of every other guitar major in the conservatory because Brazilian Rosewood is under protective status. 

Additionally, my understanding is that acrylic glass is pretty much non resonant. My power amp is made from sheets of acrylic glass with aluminum heat sinks. Its also aesthetically pleasing to look through the acrylic glass whenever the amp is powered up.

Lastly, my previous speaker tech made me a pair of headphones. The value in this headphone is its 50mm driver. The hardware is plastic. I was talking to my local dealer and he advised me to make wooden supports for the drivers, claiming they will sound better. I guess that's my next project.

@simao The North Creek Music (George Short) Glop recipe is a 50/50 mixture of their soft glue and drywall compound. I’m not sure what NCM Soft Glue is or what a commercially available product might be, but have heard Aleene’s Original Tacky Glue is a close substitute. 

Do these exotic materials really contribute to a better sound or do they add an unnatural quality to the sound. 

I don’t believe we can make generalizations as it mostly depends on the execution.  Regarding resonance, speaker design varies from not a main issue, to tuning, to some mitigation up to Herculean mitigation which is typically a very costly process like Magico, Rockport, Tidal speakers.

I don’t get caught up in the materials, what’s important is how it sounds and the cost/affordability.  

Some of the exotic materials especially Wilson’s can actually deaden the sound too much were the speakers can become unnatural sounding lacking life to the music.