Their plan and pitch for the series has always been a 50 episode / 5 season run.

Also, kinda a unfair statement seeing that the big budget streaming genre is relatively new. The only streaming service that has been around for long enough to have 5 seasons of something is netflix. And they have The Crown & Stranger things. Amazon Prime has Jack Ryan that is coming out with their 4th season.

Hulu, while being one of the first streaming service, never really went for the big budget original show strategy.

Most streaming services are less than 5 years old!