Large Play Lists - Play queue size

Volumio Information

Volumio Version: 2.806
Hardware: odroid C2
DAC: SMSL M500

Hi Users, Hi developers,

Let me ask You : What is the maximum size of play queue ? Is it limited ? Why ( same) playlists from Spotify and from Tidal are truncated, but at different number of songs ?
Why I cannot see the whole Spotify and Tidal playlists, as from native players ?
For example :
a. Spotify : Rolling Stone’s 500 Greatest Songs of All Time
b. Tidal : Rolling Stone : Best Songs of All Time