In my experience the trend originated on MTV as "Unplugged."
It featured electric bands such as Nirvana using acoustical guitars.
I always considered it a pleasant "side street."
It provided the acoustic version of LAYLA which was in stark contrast to the electric version and also very appealing to me. Loved both.
As far as concerts?...If you dont wanna go...dont go.
As far as Clapton?...He sings the song much better decades later....imho.
As far as cash grabs?...people liked the acoustical stuff and it sold some new records with old songs. My hat is off to them.