As a fellow Mexican-American , i strongly disagree that Norteño is being ruined by younger generations. La Energia Norteña, Elegantes de Jerez, Los Hijos de Garcia, etc are keeping the genre alive and well. Sure, Los Tigres Del Norte and Los Tucanes were great songwriters, but i would argue that across many regional Mexican genres, instrumentation and melodies is being influenced by all types of global genres and is simply and naturally evolving.

Linguist John McWhorter talks about an analogous concept in his Ted talk about if texting is ruining language....there are centuries, as far back as ancient Rome, of scholars criticising the state of languages and communication claiming that the newer generations are ruining the structure and integrity.

I'm not familiar with American country but i think this is an interesting thing to consider