Cool, I was about to say..........
Let's look at this from a "strategic consulting" PoV - lol.
Firstly, 4G is rather old now. 5G will be in a city near you soon.
-Are you a heavy mobile broadband user? As in download and upload a lot?
-You you need high uplink and downlink connections speeds?
-How cost sensitive are you?
-Where (locations) do you predominantly consume?
You may be a heavy user, want high predominantly download speeds. In this case, getting 4G makes sense. But..... you are cost sensitive. So, given that it's not unlimited (if I recall right, 4G plans are something like 5GB or so) and you tend to go over this 5BG limit easily, then this might not be a good idea.
Just an example.
I still stick with my 3UK one Plan. Unlimited data. I understand 3's network well (so I know exactly what I am getting). Plus, I tend to use WiFi when at home.