I'm guessing a 5G mobile option is too expensive. In the UK I have a 3Mobile (Smarty unlimited data) 5G connection, using an MC801, for £20/m and I get around 1gb/100mb with it - until the tower hits a busy period, then it drops to about ~500mb/20mb
The quality of service is the real problem. When the tower is busy (happens at least once a week), I usually drop to 30Mb/30Kb or so, which is little enough upload that even download-intensive applications often struggle. Plus, the jitter is terrible, latency is slightly worse on average, and 3 times so far I've had internet effectively down (spotty connections in the 1Kb/1b range) for days at a time.
Interestingly, "predictable uptime" is something I care about and is much better with T-Mobile. With Comcast I'd have at least one hang every 10 minutes or so for multiple seconds on an otherwise perfectly functional connection. With T-Mobile, it's either down for days (tower maintenance) or up (perhaps slow, but definitely up). That makes all sorts of near-real-time activities easier to coordinate.
I'd probably do it again (I don't think I actually have any options unless I get off my ass and finally sue Comcast), but it isn't a clear win.
It's more about availability.
I have 5G for home internet, and it's $55/month, including taxes. I get 100 to 300 mbps, though during lunch on weekdays that can slow to 50.
There are two other 5G Home Internet providers in this state. One wants $100/month for 5-100 mbps. The other won't let me sign up because it doesn't have the capacity where I am.