You could replace spacex with whatsapp in that paragraph and it would still be true- more so even- the barrier to change with messaging apps is almost zero however everyone knows rockets are hard and no one expects a failure on the pad to destroy what is looking like a good launch track record.

If whatsapp start charging or introduce ads I can't see why people would stick around, considering the Huge number of whatsapp users who also have viber/snapchat/basis sms also installed