I know at least one startup that closed its doors because they lost both production and backup data on that OVH data center.

And that's why 3-2-1 specifies to have one _offsite_ backup

Preferably with a completely different provider, in case something takes out there entire network somehow (or they go out of business).

But make sure you check where the other provider is hosted: I read it one user (individual, not a startup or other company) who had backups of stuff on a shared host with a second shared host. It turned out that they were both running on servers in that one OVH DC and they were cheap hosts with no better backup/dr plan themselves...

I'm gonna Craigslist all your stuff! https://xkcd.com/1150/

I personally was affected by this fire, although I've always kept 3 month backups of production data, encrypted, on-site, just in case of emergencies like this. Haven't touched their services for anything production related ever since