There are dozens of ways to have a group chat. iMessage is not enabling this in any meaningful way.

You think the messaging protocol itself is causing heightened bullying?

You don't think cancer is an expensive disease to treat? You don't think it involves a lot of inputs?

Cancer is expensive everywhere, the difference is who pays for it.

Vitess (sharded MySQL) is how they became relevant. But broadly they've spent a lot of time making a great DaaS. There plan is to do the same with Postgres.