it's not even the ps/xbox ecosystem, but a very specific part of that ecosystem. my favorite games on the ps2 were valkyrie profile 2, devil may cry, and dragon quest viii. the market hasn't been contracting on just outside these two platforms, but within them as well.
That comes partly from the Japanese side but there is nothing that can be done about since they move to mobile and even then they going run into problems later on .
There a dead end country in many ways and games just part of the problem with them .
People that not really grow on Japan game like last gen not really going to miss them as much as people like us that grow up in the NES to PS2 era.
EDIT i love there games but i have learn to move on .