When I was religiously hitting the weights 7 days a week and really intensely, the DOMS went away completely after about 3 months. Even with volume increasing every week.
I was also worried that I am not pushing hard enough. Read up a bit at that time and saw it was normal not to experience DOMS anymore. Especially with diet and recovery being spot on.
Now is a different story. Pretty much tender 24h after each session because I took off so long. And it is kinda nice having the reminder the next day that you did put in the effort yesterday.