Probably more like 80%. I know even some normies who go far out of their way to refuse Comcast's hardware.
Carrier hardware is also just a lot better now than it used to be tbh. I don't know what comcast is doing but both ISPs in my area (mediacom and tmobile fiber) are shipping Eeros. idk about the privacy aspects on that but they are good hardware otherwise.
I gave up and just use the Xfinity cable modem/router/access point now. Covers my entire house and even outside deck/patio/driveway. Yes they are probably snooping on my traffic and potentially proxying their "xfinitywifi" through my cable, but I use Firefox DNS over HTTPS so they can't see that, and VPN for work.