This is probably a confirmation that Apple (or to lesser extent Tidal, Amazon and Qobuz) has siphoned away a fair number of Sportify subscribers who care about high quality audio. I'll probably stick with Tidal although Spotify offers some really good features.
I've been pretty happy with Tidal. MQA gets a lot of criticism, but I have a DAC that decodes it and those re-mastered tracks sound great for the most part. They are moving toward lossless FLACs in addition to MQA. One thing that keeps me with Tidal is their support for play lists with basically unlimited numbers of songs (at least 10,000) - I have a "thumbs up" playlist that I have been curating for many years that is about 4,000 songs and Spotify in particular does not support playlists of that size as far as I know. Tidal also give more money per song to artists that the other companies. I believe Spotify is among the lowest per song, but they have many more users so probably pay out more in total.