I am scientist. University Professor , I publish a lot in my topic.
I read a lot in all other subjects of my interest. One of them is audio , That is why I know.
I agree with you , there are many ways to skin the cat , but some are better then others .
Every company tries to find something unique as most of things are patented !
They dont want to get in trouble.
In general the less vibration the better.
For that easy cure is
1 . Big mass.
2. some viscoleastic material to dampen it.
3. sendwiching it to genearte sheer for any resonances.
4. adding reinforcements.
But this is very complex problem so there is no place here to explan it all.
Some examples of articles you need to read starting with very old one :
In this article for Voice Coil, Mike Klasco (Menlo Scientific, Ltd.) reviews and looks ahead at all the materials and design approaches for loudspeaker enclosures. This article discusses enclosures using wood, MDF, plastic, plastic composites, moldable materials, coatings and pairings for those...
audioxpress.com
In the first part of this article, Mike Klasco discussed the contribution of the enclosure on perceived overall product quality as well as sonic clarity. This second part of the article looks closely at material testing, evaluation and manufacturability, and other more recent approaches to...
audioxpress.com
By: Albert Von Schweikert, Chief Design Engineer, VSA Corp. Editor’s Note: Dagogo is honored to be chosen as the platform for the first publishing of a new Whitepaper by Albert Von Schweikert. Lately, several high profile speaker companies have launched advertising campaigns using their cabinet...
www.dagogo.com
There are few hundreds articles I checked long ago, so in summery your simple question has no short answer and needs many pages of explanation.
Why dont you read it yourself ?
If I dont know I check what is published. All we know as humanity is published somwere.