I agree that prior gen ports, remasters, remakes should be complimentary to new games, not the entire release catalogue.

The giant problem is that (outside of Nintendo), the major publishers only want huge AAA releases (presumably to be platforms for further DLC and MTX), requiring colossal budgets and even bigger marketing budgets, which then makes them severely risk-averse, and keeps them making the same games over and over (effectively). So even when the "new" games come out, they are really just more of the same with a different coat of paint.

It's at the point were it takes min 5 years for development, so you end up with at most one entry in a series once per gen.

There's been no new Elder Scrolls since 2011, no new Fallout since 2015, no new GTA since 2013. It even took Nintendo six years to release the next Zelda game after BotW (which is sorta kinda DLC or expansion tier).

Those may not be series that appeal to you, but they are sort of barometers for AAA development in general.