There is a huge difference between buying a solar panel once and having it generate energy for the next 30 years vs. buying a barrel of oil now and consuming it by next week.
It's the same difference as buying a house now and owning it until it collapses vs. renting a house and being at the mercy of your landlord, or buying a piece of shrink-wrapped software and using it for the next 18 years vs. renting a SaaS subscription that provides a different product next month.
> buying a piece of shrink-wrapped software and using it for the next 18 years
I'm wondering how that works. I have written software that was still being used, 25 years later, but it was pretty much a "Ship of Theseus," by then.