Cable, yes. WOW is planning high-split soon, and also fiber in my city but it isn’t complete yet. The alternative is Comcast but there are ridiculous data caps and you have to use their gateway for the higher tiers. They also pulled the “failed to return equipment” scam on me back in 2007. That stayed in collections for 7 years, fuck 'em.
Avoid Intel based solutions https://lookgadgets.com/articles/intel-puma-modems-list/
Almost all 32x8 (capable of 1 gig) docsis 3 modems are going to be puma based.
No reason not to get docsis 3.1 unless you are truly cash strapped. That leaves the SB8200 if you’re ok with 1Gbe ports, or the S33 if you want a 2.5 port.