They will still have caps somewhere because they have to protect against network abuse. It may be in some fine print that says something about abuse, or it may just be that "all customers in this area share a cap" - you can't make an upstream connection go faster than it can go.
I see slowing down during peak hours as different from a data cap.
But if 2% of your users max out the connection all day every day, and you bundle a couple hundred users onto an upstream connection, it shouldn't be hard to keep the upstream from maxing out despite tons of oversubscription.
Depends how they architected the network.. maybe the design can scale and tolerate it up to a higher point compared to Comcast's ancient steaming pile.
Bandwidth hogs occur at a predictable rate.
It's amazing when a telco company actually delivers a product customers want. AT&T is somehow pulling it off despite their organizational dysfunction.
They must have capped some people in between "threatening to reinstitute" and "rescinding", because I suddenly started having to pay more for going over 1TB about a year ago, mid-pandemic.
Even Comcast let's you pay an extra fee for uncapped bandwidth, physical realities be damned.