Because it became full of spam, obscene and illegal material.
For all their faults, big tech do mostly moderate their sites to the extent you won't find illegal things there.
For all their faults, big tech do mostly moderate their sites to the extent you won't find illegal things there.
About half of all email messages are spam nowadays (https://www.statista.com/statistics/420400/spam-email-traffi...), and that’s less than ten years ago.