Same here, but I'm just turning 49 soon so I'm expecting wanting to ensure access to some of this original data (my own music projects and projects I've worked on with/for others), as well as all my photography, for at least the next 20 years. At some point though its importance will wane if it's not gifted to someone else who shares in its value.
There will always need to be some form of electromagnetic immune storage solution, and for data these optical discs are the most robust and cost effective. We won't be able to guarantee daily snapshots of the internet to bluray, but critical works of art and documentation can certainly be archived in the event of some natural or human caused catastrophe. I figure for the nominal cost and effort/time necessary, I mind as well keep the things I've created/own digitally archived in a fire safe.
In IT the greatest regrets we see with clients who face some type of intrusion or fire/water catastrophe is lack of robust backups. It serves as a reminder for me to value the things important to me enough to have a functional copy. What that means for each of us is determined by our values and priorities. I have very little of my extensive retail music collection backed up, but it is insured under a specific collectibles plan I carry. If it's lost and I can't get it all back, oh well. But losing the masters of my personal music and pictures -- hell no.
When I worked for a retina specialist everything was paper except for insurance submitance which went through a dial up modem in the wee hours of the morning. Transitioning to EHR was a painful experience esp for the doc. But we had some very good outside IT techs that set up everything horror show proper. Among other things a large server with maybe a dozen HDD's set up in I think RAID 5. Then every night it was backed up to cloud storage, one in the KC area & one in Los Angeles.
My back up needs are a bit more modest. The data drives in my family PC & my AV PC gets cloned every few months so if something conks out I just swap out. And I clone/replace my internal data drives every 5 or so years for something better/bigger. I also keep many copied files on external HDD's via docking stations... these aren't even in daily operation.
And then there's M-Disc. My logic for the M-Disc is what would would be my biggest regret losing should my basement flood or house catch on fire? Easy to ask: what if your house catches on fire and you can't get to them? True but I'm just trying to illustrate my decision making for what I do or don't save to M-Disc.