I think that now the market has returned to normal
Not many people had SLRs even in the past, in the film era, only professionals and enthusiasts. Most of them used compacts, that's how it is today, except that today's compacts can also be used as a telephone
. The DSLR market was a bit inflated, many buying an entry level DSLR with a kit lens, as that was the fashion. Since FFs have now become affordable for most enthusiasts, it is likely that FF MLs will become dominant in the photo market. I think that the APS-C format will go into decline, those who want less bulky and more portable equipment have the option of the M43 format. As for Pentax, the tendency is to become like Leica, a narrow market niche, for connoisseurs
.