The PS5 being behind the PS4 isn't a recent development, which is quite impressive all things considered. When PS5 got its first price hike years ago, I expected PS4 to extend its lead by a lot more than 2 million, and that the PS5 would eventually catch up due to a longer generation + longer crossgen period. PS5 is performing above my expectations (I originally expected around 140 million lifetime but my conditions were a PS4-like price trajectory and a stronger first party lineup. Little did we know that prices would keep rising instead of dropping. I also had no idea shortages would last for over 2 years!).
PS5 will definitely have a longer tail, and should be supported longer than the PS4 in both production and software. Sony implied longer PS5 support BEFORE the RAM crisis started. PS4 sales collapsed unnaturally because Sony initially wanted to convert PS4 players as quickly as possible to PS5. This is not how it's going to play out this time for obvious reasons. Sony would be moronic to launch a PS6 in 2027 and cease PS5 production (which is the only realistic way to give PS4 a chance of winning in hardware sales). A 2027 PS6 would be outrageously expensive, millions of lowend console gamers including the tens of millions stuck with PS4 would rather upgrade to a standard PS5 or a cheap PC. Every Playstation player stuck to PS4 is potentially a PS5 advantage (late PS4 didn't have "reserves" stuck with PS3 so to speak).The ecosystem itself is much bigger than it was during PS4's final days. PS5 can capitalize on this in ways that PS4 never could.
For your 105 million assumption to come true, the PS5 would have to ship only 8 million units this year, and another 4-5 million for the remainder of its life lol. It's plain silly in the context of GTA6 and future titles that will eventually leave the PS4 behind (Football, COD, etc).
