The dev does fixes as files to replace existing files rather than updates.i see this game keeps going ... is it good or bad or just fix updates
Updates are new content, and include fixes since the previous update & occasionally changes to things (like when potion & kitchen crafting got easier to do).
I think it's good, you might disagree based on personal tastes.
The RPGM software is reaching its limits. The next couple of updates after 3.91 are supposed to "complete" the Main storyline, then one more for aftermath/cleanup/fill-in, maybe two. There might be more after that if the software can handle it. It's reaching the finish line, probably next year, but no promises on precisely when that will be.