But in terms of lifespan, M-Disc would be better option as it claims can last 1000 years with bigger storage. Although you need to encrypt the file manually and certain DVD writer which also support M-Disc writing.
I never in my life saw M-disc and you would probably have hard time finding and playing it in future, but yeah they will survive longer, unless someone scratches them 
Aside from scratch, finding device to read/play it shouldn't be hard since you could use any DVD/BD reader. I expect few company will continue to make DVD/BD reader in the future.