I currently have a 4G plan at 60 GB for 3 months, I am not given the option to upgrade to 5G which is a deal breaker as I purchased a new phone that is 5G capable.
I believe it is worth the switch, I just made the switch over to a 90 day cycle myself. If you’re comfortable paying for 3 months at a time and have the ability to do so it is going to save you money.