More and more games seem to suck on thier own, but can be great with mods. You have entire platforms like roblox where all the games are more or less mods. How long until the platform itself is community created and managed and the viability of games created by companies dissappears?


I disagree, rather strongly.
The evolution of gameplay comes from the diversity of design.
This occasionally enables games, of varying quality, to break with orthodoxy and to create new paradigms.
The two stick control method we use for FPS, for example, only happened because someone broke with convention when designing Alien Resurrection for the PS1.
It was absolutely planned at the time, but soon became the standard.
My point is that you don’t know what needs to be improved until the alternatives appear.
So no, inventory should not confirm to a standard. It should be entirely driven by the aspirations of the designer and the needs of the game.
There will be times when games don’t get it right, much like in biological evolution, there are mistakes and dead ends, but the only thing you really want to avoid is a monoculture.