The product's lifetime is as long as they want it to be, so maybe 2 years after the next version.
My Windows 2.11 PC still has a valid license, the Windows 10 laptop, not so much. 11 won't install on any hardware i have.
Life was easier with 95, just put in a few random digits for the license key - usually worked within 5 attempts and no internet required first.
And yes, penguins rule in most other places.