TL;DR
Have a version filter when looking at user uploads on the Mod Portal.

What?
If you look at a modder's page for uploaded mods, it will list everything unordered, like look at this one:
https://mods.factorio.com/user/Quezler
Some 2.0 then 1.1, then 2.0 again, etc.

So similarly the browse ...

Yes of course, it's more about making it manageable for first time users.
There is already the Interface settings "Show all items in selection lists", maybe that could be used

TL;DR
Hide items from Factoriopedia that are not yet available.

What?
Make it so Factoriopedia and other places only shows available items.
Inserter's filter is almost good, but even that has stuff slipped through (I see fluoroketone barrels withouth leaving the planet).
Optionally it could ...