compare that to game consoles where the last gen could be cut off from new games at any given time, and next gen is a crapshoot whether the manufacturer will support backwards compatibility.
But that isn't the case anymore, and I expect it never will be again. This generation's transition period has been so heavily reliant on backwards compatibility. Hell, plenty of titles still just launch on PS4 since PS5 can run it anyway.
The only exception has been the Switch, and that's because it was necessary just this once to break away for a new architecture. I can almost guarantee Switch 2 will be an evolution of Switch 1.
At this point the big three are locked into their current architecture. They need backwards compatibility, if a new console ever tries to break from that it will flop as a result.