Without a true Squarespace "Site Backup" tool/facilty, we could lose clients

I've scoured the Circle Forum and done numerous web searches...but yet I'm seeing that Squarespace continues to not have a site backup tool/facility like its competitors.  Don't get me wrong, I'm a huge fan of Squarespace, but to not have any means to back up one's site is awfully egregious.  Moreover, it frequently knocks me out of a proposal competition when a prospective client asks (and most do) "how will my site be backed up?" and "how will my site be recovered in the event of an 'event'".  

I can't answer that question if I intend to build the site with Squarespace.

So here I am pleading (and I think I can speak for so many web developers here):

"Squarespace, please give us a way to fully back up our websites"

If there's a real solution out there, a real backup solution, I'd love to hear about it:  manny@etsdesigngroup.com

Thanks so much!