make java have bedrock world mechanisms

so basically, yk how you can join bedrock worlds of people you've friended? i already know that this is coming to java, but how about this:

if you're playing with modded minecraft (i play with a sift mod + a zoom mod), it doesn't let you join their world with the mods but it does let them join you with your mods.

so:

if i joined my friend in their unmodded world, then i cant use my mods. but if they join me, they can use my mods. also make joining with mods optional if they dont want to use my mods in my world.

get it now?

this would make servers extinct since world joining and server modding would be easy.