I have been using Calyx for the past few months, which is a 1 year pre-paid connection through the T-Mobile network for $750 the first year. No data caps, have used it in the Southwest, South Central, and Midwest parts of the country with fairly good results. I measure up/down occasionally and get anywhere from 30Mbps - 250 Mbps up / 1 - 25 Mbps down. Lots of variety in the signal based on location and time of day, which is my main complaint, but it should be expected with a mobile data connection. Not fancy, but I go through a lot of data at my job and generally don’t have much problems streaming video.
To be honest, I will probably try to switch over to a fiber connection when my year is up because I’m not longer working from the road, but it really hasn’t been the worst solution by far.
Optimization feels a lot less optimal when it leads to enshittification. I have worked on the tech side of accounting systems in the US for the last 10 years and can say that American companies have largely embraced this category of innovation as well.