I am not meaning big updates. I mean anything. From tweaks to minor alterations or additionsto major overhauls.Some of the consumer base wants free updates. But I don't think it's nearly in the numbers you think it is.
Some of the fandom wants little tweaks. Some of the fandom wants big sweeping changes. Some of of the fandom wants something in between. Most of the community would like some parts of 5e altered, even if it's small. The minority is 100.0% satisfied with their D&D.
The main uniting force of the people that want change is their uneasiness in spending money for change. WOTC has to run on hype, nostalgia, or shotgunning hooks into books to snag customers.
If electronic files were not a thing, most 3PPs would go broke as they would struggle to sell niche softcovers and hardcovers.