a few things to keep in mind...
KMP, DMP, and now LMP all are MODS created by the community that adds a primordial form of multiplayer, its not perfect at all, but it proves that multiplayer is possible.
The community could run their own servers if Squad released the server software alongside the client, just as most games do like minecraft, CS, gmod...
Timewarp issues are already solved, just look at the mods i mentioned above, there are many solutions to the issue, each with their own pro's and con's; none of them game breaking.
Griefers could be an "issue", but i think we're all mature enough to not do that, most people just want to be able to play with a group of friends or find new friends on servers. Griefers can be banned and crafts can be relaunched.
Lag isn't an issue because relativity. If you're docking in space, you shouldn't be travelling 3km/s relative to the craft you are docking with when close/approaching; the mods i mentioned above allow people to dock their craft together, and if all the checks for if a ship is landed or not is done client side, then sent to the server, lag would be irrelevant.
The reason why people really want squad to develop multiplayer is because we've already created one, proving its feasibility; but its very limiting and buggy, career mode and other aspects of the game have no way of handling multiple players on a single save, so sandbox mode is most commonly used used, also whenever updates are rolled out, the mod usually breaks and requires some time to be fixed.. I know from experience that DMP will often rotate flying craft 90 degrees and cause them to bug out while flying through the air, its bizarre and dealing with that stuff is time consuming and hard to fix. it would be nice of squad to listen to their community and create a stable multiplayer. We don't need a KSP2 quite yet, much can still be done with this amazing game, so long as people work to improve it.
https://github.com/LunaMultiplayer/LunaMultiplayer
https://github.com/godarklight/DarkMultiPlayer
personally, im disappointed with the making history expansion, but i would gladly pay 15-20 bucks just for solid multiplayer support. being able to share the KSP experience would make the game 1000x better, just flying space planes together is amazing.