The title of the post confused me at first. I don't think I've ever seen "OK" used as a measure of difficulty.
The "Here's how" gave it away, but I originally thought the article was an argument against people feeling bad that they do development work on the side.
I've clearly been spending too much time reading English.SE...
It's not using "OK" as a measure of difficulty. It's saying "don't feel like you're wasting your time on a project just because it isn't going to make you Ferrari money". I guess it's a restatement of the programmer's adage "Don't let the perfect be the enemy of the good.".
The "Here's how" gave it away, but I originally thought the article was an argument against people feeling bad that they do development work on the side.
I've clearly been spending too much time reading English.SE...