Well this issue has been raised before but hasn't got enough attention so I'd post again here...
I started to try out the Email Subscription but realizes that it is absolutely unusable now - the dashboard/report that is attached in the email (as a screenshot) is too small.
Using default visualization styles, I would have to zoom in to 200% to read the texts.
I've tried multiple email services (Outlook, Outlook Web, gmail) and tried Outlook Mobile to see if this thing only works on Mobile. It does not.
Now, Tableau has this functionality and works perfectly. I get a snapshot that I can read in the email and quickly get the insights. With Power BI now, I would either 1) open the .png attachment to see the visuals, or 2) zoom in in the email client (assuming that I can, in that case Outlook) to 200%, or 3) go to the link below to view this in Power BI website.
All these options are incredibly burdensome especially for executive level people - they just want to take a quick look and get the insights. With this, it is very hard to push for Power BI in the corporation against Tableau.
I see this as a perfect functionality but 99% done. The thing is, without the extra 1%, this is absolutely unusable.