Describe your ideal mp3 player

There are now a few players that have two microSD card slots. I haven’t noticed any with 4 slots yet.  The players I have noticed with two card slots are all over $100, with some even over $1,000. They also have short battery life, 11 hours or less. With the increasing interest in FLAC and especially high resolution files, having multiple card slots makes sense. I guess something like 300 CDs ripped to FLAC  fit on a 128GB card? Some people have music collections with thousands of CDs, and to carry it all in FLAC they might need a player with 16 card slots.  Before we see players with 8 card slots though, we will need to see at least a few with 4 card slots.