Not throttling is part of the point of net neutrality. Requiring ISP's to build the capacity that's required to deliver what they paid for and requested by there users, not what they want them to offer. Sure sell 1mbps internet 1gbps comcast junk service but you better deliver that 1mbps of whatever your customers want and true in advertising better mean the 1mbps number is the big shiny one not the all you can eat comcast stuff.
Good ISP's are proactive and increase capacity using forward trending, it's not cheap but it's really not that expansive either. Most correct the issue quickly under 90 days. The bad leave connections saturated daily hoping it will go away and refusing to put anything into their product. Need to make the bad practices illegal for monopoly holders and the various corp constructs to separate monopoly and long haul carriers.