I would say the biggest downsides of wireless would be inconsistent/high latency and throttling/network congestion. Are you sure there’s no fiber near you? CenturyLink or Webpass(Google Fiber) might be around. There’s also Starry nearby that does point to point wireless which doesn’t have the same downsides as 5G.
I’ve used Comcast and CenturyLink. I would say CenturyLink, while not perfect, is miles better than Comcast. I pay $70 for gigabit: symmetric, no data cap, never had an outage, monthly contract. Only had to deal with support once when I was returning their router.
Comcast had shitty uploads, long contracts, data caps, outages, shitty support, would call me randomly trying to sell me TV plans. I had a Comcast tech cut random wires in the network closet for my building and gave me an outage when I was using Starry, they’re beyond horrible.