I've seen solutions where connection provider and Internet service provider aren't same entity. If connection provider connects customers to POP where there are

I've seen solutions where connection provider and Internet service provider aren't same entity. If connection provider connects customers to POP where there are several Internet provders, it makes it trivial to switch service provider. I've also always avoided deals where Internet operator owns cabling. It's much better that those are separated. There was a free offer for fiber connectivity. I refused it, ordered own fibers and now it's possible to choose provider quite freely. Because switching provider doesn't prevent using the same fiber with them.