I always used interlock. Overlap felt "weird"
But, in golf, learning something new always feels wrong at first.
This last year I made a real effort to switch to overlap. I had a lot of other improvement items I played with and practiced a lot so the big gains (18 or so start got as low as a 10 which I hope to continue to work on) could be due to many things.
However, overlap now feels quite natural and allows me to more easily move around strong vs weak alignments and figure out what's best for me. Definitely overlap helps to let me adjust the right hand out of the equation which is huge for being more consistent.
This and couple other things were real eye openers - So I'm working to find someone to take lessons, I'd be happy to start from scratch with the right instruction just to see what there is to learn and improve on.