We have cable too. I bought this DOCSIS 3.0 cable modem in 2014. It's been fine. (We don't have super-speed internet.)

I upgrade our home WiFi much more often than the cable modem. We've had good luck with TP-Link stuff and at the moment we're using these WiFi 6 boxes and 4 older Deco pucks for use in offices and other rooms. They work well together.

I plug in cheap gigabit Ethernet switches to expand connections to them.

HTH a little.

Cheers,
Scott.