Is it a feature we can expect to see in On Prem sometime soon?
By not supporting it anyone who has spent time using the Site version and building reports based on RLS end up supporting multiple security models based on what paltform the user is on which, to be blunt, is a pain the a$$. We are using the site version to give access to our mobile workforce and On Prem to service the rest of the users, now it looks like I will need to make a "On Prem" version in order to do it with RLS at the DB level.
It was bad enough that we had to wait until now for sensible Matrix tables (which are great thank you very much) but now its another kick to the On Prem group who pay a fair ammount in Ent sql licences for the option to run On Prem. I know the on prem cant be as up to date as the latest and greatest but a fair amount of fuss was made over the RLS in PowerBi so its dissapointing to not have it here.