In 1995 or even 2001, this was a completely reasonable line. Most software was written for Windows, and Microsoft clearly considered it taboo to break old software, whether their own or third-party. You could install Office 95 on Windows XP if you really wanted to, which didn't seem unreasonable, as you spent $300+ on the suite.

Giving this advice to developers today is frankly absurd career advice.

1. Few apps can achieve the scale needed for a one-time fee to be sustaining for the app - most apps appeal to a finite set of people, and eventually most who are in your target market (and who are willing to spend actual upfront money), have bought the app.

2. An entire generation has grown up that has never paid more than maybe 99 cents for software, and most refuse to even pay that - they're used to adware. You can't price an "app" at $75 and expect it to be bought by essentially anyone. While adware can actually be a very financially viable route, many developers hate ads and want nothing to do with this model.

3. Unlike the multiple years of stability of old desktop operating systems, platform owners today think nothing of breaking even a plurality of apps with any major OS version - and for some insane reason they also think a new "major version" ought to come out annually.

If you want apps that cease getting updates after a few months and age very poorly, or just to have no choices out there besides adware, keep boycotting every developer who uses a subscription, regardless of how cheap it is.

If you want apps that are diligently maintained and which keep working forever, reward developers who produce apps with reasonable subscriptions. I have a password manager that's $19 a year and covers my whole family, and a podcast player that's $15. That password manager comes out to a nickel a day.