Many new shows these day never see a release on physical media. Disney is notorious for this with popular series like Star vs the Forces of Evil (2015!), Amphibia, and The Owl House all unavailable for purchase.
I agree that physical media is ideal, but that only works when companies are willing to take our money. There are a growing number of shows you can't see anymore at all, can't see without a streaming service, or can't see uncensored unless you're willing to pirate them.