Films and TV shows are not software
Films and TV shows are not the same as software.
Most films and TV are watched once, maybe a couple of other times if you really liked it. Finding that it has become unavailable 5 years later is not a disaster. In most cases you have the option of buying the DVD.
Most software you will use repeatedly. Your 1000th use of it five years after you first purchased it could be just as vital as its first use. It can become integral to your business or personal life. Discovering that it has become unlicenced and therefore unusable could well be a disaster. You may have no other option.