'Rainbow Six Siege' keeps getting new content. Will it keep getting new players?

The game is as wide as the Pacific Ocean at the beginning of a rookie's R6 tenure. There's always a new operator to learn, a new gadget interaction to test, a new strategy to try, and the horizon is constantly expanding. Put bluntly, players must do a lot of homework and suffer tens, if not hundreds of hours worth of hard-learned lessons before they feel they can contribute competently. On one hand, the game's complexity is its biggest appeal, on the other, it's a significant barrier to expanding its player base. While that number is massive, numbering 70 as of this year, could this ongoing expanse and evolution eventually case that player base to stagnate?