Lots of local branches sounds great for personal banking, but for businesses? Unless you have a nation wide franchise business or a logistics business, doesn't seem as important.
On the contrary, a highly concentrated bank might be better, everyone is on the same building, there are no encapsulated branches, you get assigned a banker that is the best fit, rather than the one who was born closest to you.
Depends... If you want to be able to go in and do business banking when you're visiting your parents? Might be nice. I dunno.
The thing is that if there is a single branch (or few branches), then there's processes designed to be able to be completed remotely, with phone calls or faxes, etc...
When the bank has many branches, there will always be some steps that require visiting the main branch, and the opening branch.
With a single branch bank, the main branch and the opening branch are one and the same. And it's the best branch.