yea, without TPG, we still be stuck without roaming data until we cleared immigrations and customs clearance.
Before landing in Singapore, we had to change to appropriate sim cards. i believe countless sim cards are stuck in the gap of airplane seats
but TPG started it few years their launch though.
After that, every telco and MVNO started to give a bit roaming data. then telco started rolling out e-sim.
Those who frequently travel to another country, no more sim cards stuck in the gap of airplane seats! we can have one physical overseas sim card and one e-sim card for local sg use.