I was facing consistent multi-hour outages during the workday and looked into business internet options with my ISP (Cox) and from what I could gather they _did't even offer_ any plans with an SLA in my market.
I've used it several times as a backup, e.g. during power outages. Not a bad perk.
Buuut at least in my neck of the woods they offer wifi with excellent coverage over the neighborhood that you can sign into with your Cox account. I've used it as a backup (eg during power outages) several times. Not a bad perk.