This is what I'm doing as well. Apps have increasingly gotten more annoying in more ways - from unnecessary pop-up notifications (increased permission requests, policy updates, review pan-handling, etc), privacy issues, data hoarding and more. I also hate that almost all of the few remaining apps I do use are constantly pushing new versions into the app store, invariably with only a vaguely non-specific unchanging boilerplate sentence as a change log. Yet I never notice any new functionality or capabilities in the app and all-too-often updates only bring more ads, cross-promotion or other general enshittification (like just renaming or regrouping the same functionality in different ways - apparently for no reason other than to increase some internal aggregate 'usage metric' to hit a KPI). Although I don't know this, I assume app store algorithms must somehow (perhaps unintentionally) incentivize developers to constantly update their apps for little or no reason.
So, as a group, the long-term behavior of app developers has taught me to resist updating the few apps I do still have installed.
That would be a win for everyone.
The typical app store workflow for me is I visit the store to download a specific app I'd like to install. That app will then have to download and install while I wait.
That "while I wait" is an ideal time to ask me to rate other recently installed apps, or an app I haven't used in a while.
The key is catching the user when they aren't completing a specific task. People often check email to pass time, which is perfect for this.
The major apps typically exploit selection bias to solicit 5-star reviews. They will wait until the user meets some criteria for "having a good experience" and show an app review prompt at that moment.
Then, having amassed thousands of 5-star reviews, they will turn up the threshold so that only a trickle of the most likely 5-star reviews keep on trickling in to negate any negative organic reviews.
There's a related practice of "pre-prompting" where the app first asks the user whether they are satisfied and only solicits a real app review from those who pass the screening question.
It's all quite shady and makes it hard to trust app reviews. But until the app stores solve this, app developers need to play the game.