Many developers don't realize that steady updates, are one of the most important ways to attract customers, some visual novels are great, but not updating them once a year or half a year takes away the incentive to patronize them
You won't believe this, but all developers realize this. And it's not just about the money they earn and the number of patrons. If an author is really "sick" of his story and characters, he strives to give them as much life as possible.
The only problem is that before you put an update on Google Drive, you need to write a script, scene-by-scene breakdown and dialog. Select interiors and character costumes. Set the posing and emotions of the characters. Render. Edit the renders in photoshop. Make and render animations. Find and process music and sounds. Program,
add mini-games, edit and clean up bugs. Translate the game at least into English (if it is not the author's native language). This is the minimum program. And many people (like me) also have to edit assets and 3D-modeling. Maybe write the music himself. And it is almost unrealistic to fit all this into 2-3 hours of daily work.
So frequent and regular updates can be produced either by large studios of several people, or by a few lucky loners whose games bring enough money to make it their main income.