I don't understand the general attitude against forced modem upgrades. If you lease your modem it's as easy as walking into a Comcast store and swapping it for a new one. If you own your modem, pick the newest model of modem that fits your needs.

The newer modems support more channels and newer modulation/technology. This isn't just about supporting newer speeds. In order for them to support those newer speeds for other customers they have to upgrade their equipment to support more channels and newer modulation/technologies.

At some point these older technologies are not just wasting resources by being less efficient, but are preventing the company from upgrading their equipment.

The reason I don't understand, is because it's common to see people complaining about the state of broadband in America compared to other countries. Yet Comcast is probably the most progressive as far as pushing the technology goes. Don't misunderstand me, I believe Comcast holds a near/total monopoly in many locations around America but at least they're progressive with their network and technology despite the lack of meaningful competition.