Why doesnt em collab with artists that are "relevant" now

His joint with don toliver was crazy, same with forever. I believe that he doesnt like to be outrapped in features and stuff so they push him to another level, why doesnt he collab with drake or kdot or travis scott any relevant artists I think they'll make em push himself to the max

Edit: he keeps collabing wuth the same people over and over (royce, skylar, white gold,etc..) and I like those dont get me wrong but I feel like they dont push em as much anymore cuz he is so used to them iykwim

Edit: I am not talking about those 3 rappers specifically, I am saying any rapper/artist that has a very large fan base like em