I posted my thoughts in a thread I started nearly four years ago. I would like to add one more reason I much prefer the bi-level kitchen counter tops.........
Hubby and I were at a friend's home and several of us were standing around the kitchen counter which was a one level slab type counter. I never realized this but there is no where comfortable to rest an arm on when "bellying up to the bar" because there is no bar. LOL.
Hubby and I have had gatherings at our home and people seem to always gather around the kitchen. Sure enough, folks lean on the end of the second tier of the counter top when conversing. It's just a natural thing to do and makes standing there more comfortable.
Here is the link to the thread I started back in 2019.........
Kitchen Island Counter Height vs Bar Height