Maybe an issue on the back end skipping over all of the new private subs? I assume that many of the big subs had popular posts just before they went private, so the server has to spend more time skipping over private posts when rendering popular?
First and foremost, get third party clients working again. I am used to RiF. I tried the official app. It was very busy but showed much less useful information per screen. I could not even even leave it installed on my phone. It kept spamming (shitty) notifications to try to goose my engagement, even after I disabled them.
Anger about bad corporate decisions fades, but if I cannot comfortably use a site, I cannot come back.
Modern frameworks don’t help with business logic corner cases. You would want to carefully analyze the algorithms of the legacy code and rewrite same logic in a new language. Even then, the same logic operators don’t work the same in every language (automatic type conversions, truthiness of non-boolean types).
Mission critical code. There are decades of bug fixes. The biggest cost of rewriting it is a risk of errors in the logic.
Sorry, I am a programmer, not a Spotify user. What is wrong with this image?