> When it's a subscription as a customer you have more trust that it will continue working. When it's a one time purchase, who knows how long it will last.

Funny, for me this is the total opposite: subscription software may end any time and then you got nothing. One time purchased software you can just continue to use. Well, I guess in the games of rent-seeking, cloud-only, security and updates the viability of this is fading...

It depends on the software. Is it an isolated thing? Then yes, you can continue to use it. But apps that read from APIs or scrape data are one version away from not functioning at all. Hence, regular updates. Hence, subscriptions to justify the ongoing modifications.

Total tangent, I used to have the Office 365 subscription but canceled it, yet I can still use word/excel - I've just lost access to the cloud features which I wasn't using to begin with - I would have thought they'd disable my version of word/excel but when I canceled it did not happen.

True, with #1 this is pedantic but it could be restated as the worth of your product is what people are willing to pay.

> 1. You charge what people are willing to pay, not how much your product is worth.

What's the difference?

Probably better phrased as:

You charge what people are willing to pay, not how much you think your product is worth.

Or maybe:

Your product is worth what people are willing to pay.