We've got 3 kids, 15, 9 and 7. I will say this, more photos / videos exist of our 7 year old, than our 9 year old, and more of the 9 year old than the 15 year old. This isn't because technology has gotten better, just that technology from 8 years ago or so is more similar to technology today, and unfortunately for some events of the 15 year old's childhood, we've lost pictures and videos because of changing technology.

My big lesson in my kids' lives: Avoid vendor lock in. This also covers the "neat open source project that I'm sure will catch on" temptation.

One thing is for certain, change. I'd strongly urge just backing up the images on different discs, and even putting copies into Amazon glacier (I'd suggest encrypting them, but it might be too easy to lose keys, so whatever your risk tolerance says). Whatever you do, keep multiple copies. Things get damaged over time, bitrot is a real thing. Clouds aren't forever.

Anyway, congratulations on the new addition to the family, hopefully you don't make mistakes I did by keeping some photos in only one place and on one kind of medium.