How long will the deep ladies field in Russia last (and will it deepen even more)?
History tell us is that deep fields tend to be diluted a quad later. Fields become diluted because many skaters retire or lose their skating strength
The 2002 US ladies field was incredibly deep with four skaters capable of medaling at the Olympics (Kwan, Cohen, Hughes, Nikodinov) and a host of other strong skaters (McDonough, Kirk, Liang, Corwin). This field remained fairly strong for a couple years, then crashed in 2006.
Similarly, the Japanese ladies field in 2006 was perhaps even deeper, with Asada, Suguri, Arakawa, Onda, Nakano, and Ando at the top and world-class. The skaters below (Ota, Mai Asada, Sawada, Kitamura, Takeda, etc.) were also very strong. This field remained strong in 2010 but had diluted to the point where depth was no longer 'remarkable'.
What will happen to the Russian ladies' field in 2018? Generally fields don't remain deep for very long, but this situation may be different. First, the field has rarely been this strong in any country (to the point where Pogorilaya made the GPF, skated alright at Nationals, but came in 8th). Second, there is a rising of very talented juniors to the senior ranks every year. However, general trends tell us that many skaters do not stick around for very long.