Reticulum is a great project, but it's not a replacement for the internet. LoRA (a potential piece in that chain) has very low data throughput; it's fine for messages, but you're not delivering web pages or streaming media with it.

Unless and until the throughput can be increased, Meshtastic/Meshcore is really only a replacement for text messaging, which might be perfectly fine for setting up encrypted comms or rapidly deploying communications in an emergency scenario.