In the past I've been adamant on buying the LTE+Wifi iPads (because more options right?). In hindsight however, the cellular feature was barely used.
Have you considered an LTE mobile hotspot? It can be left charged (but off) in your laptop bag for days/weeks and only used for travel or as needed. I found it to be super useful and not much hassle at all. Also multiple devices can connect rather simply.
Lastly, a benefit of this sort of decoupling, is it allows for using a different network carrier to the mobile phone, thus effectively increasing one's LTE coverage.
Have you considered an LTE mobile hotspot? It can be left charged (but off) in your laptop bag for days/weeks and only used for travel or as needed. I found it to be super useful and not much hassle at all. Also multiple devices can connect rather simply.
Lastly, a benefit of this sort of decoupling, is it allows for using a different network carrier to the mobile phone, thus effectively increasing one's LTE coverage.