Log Analytics Dashboard Options

I am interested in understanding OMS dashboarding options. My understanding is as follows...

1. Within a single OMS workspace, I can only build and maintain one overview tile based dashboard (the overall dashboard you see when you first log in).
2. "My dashboard" is deprecated, meaning there is no concept of a personal dashboard within OMS. Also, whomever has access to the OMS workspace sees everything that is on that overall dashboard (i.e., there is no way to hide certain tiles based on user or role).
3. For more customized dashboarding needs, we would need to either integrate with other tools (i.e., Power BI) or pin OMS query results to an Azure Portal dashboard and share those with whomever else needed those.
4. One main constraint of pinning to Azure portal is that tabular views are limited to only four columns of data, no more.

Are these statements valid. If not, could someone point me to some documentation showing otherwise please? I am particular interested on the best options for creating customized dashboards that only specific teams/users have access to.

Thanks in advance!