Again, own anecdotal observations are that the youngsters that are actually in bands and leading the charge for hard rock/rock (guitar-based) music are def into the classics. Check out this Guitar article and tell me if these kids are shunning Gibson and Fender:
1. John Notto; 2. Whitney Petty; 3. Jared James Nichols; 4. Tristan Thomas; 5. Blake Allard; 6. Tyler Bryant
guitar.com
I think Covid changed the game actually. With all that time on their hands a lot of young people who were already playing got a lot more serious about playing music and a whole new generation started learning. Guitar music, specifically rock, isn't going anywhere any time soon.