DVD was made with organic dyes that are susceptible to disc rot. For a brief time some cheap blu rays were as well.

Now though all blu rays are inorganic and should last about 100 years. Some can last closer to 1000 years.

So far mines still work. It’s the DVD players that are less reliable. But still I bought old Dell workstations that have one of those installed.

I buy physical media, and immediately rip it to my Jellyfin library.

The disc goes into a big case logic cd case, and the digital file gets backed up to two other places so there's almost an infinitesimally small chance I lose access to the content.