For me it was when I noticed that some of my photos had been affected by bitrot.
Instarted building my NAS last year, and got caught up in the increased HDD cost, I need two more 8TB drives to get my 32TB Zraid2 going.
I was going to use TrueNAS, but now that they have turned their back on opensource, I am not so sure anymore










SGA is fun, but SG1 is better