I want to dispel some myths the younger players might have about the "MMOs of eld" that I see popping in this thread.
You guys are putting the cart before the horse. The content in the older MMOs wasn't designed for group gameplay to "encourage/force interactions" - it was designed around the group gameplay because majority people were already playing in groups.
Was it because of the difficulty? Not really, levelling in WoW on release in the end of 2004 was perfectly solo-friendly and yet most people at least for the first year or 18 months were playing predominantly in groups.
Why? Because most of them didn't know wtf they were doing. There were no guides, wikis, youtube etc. There was no discord and MSN messenger at a time didn't support sharing pcitures so you coudn't even post a screenshot of the map to show where you need to go (if there wasn't a quest marker - but on release most people didn't even know there WAS a map)
So people grouped up naturally (for example I remember a guy showing me and a bunch of noobs way to adjacent zone by leading us there as it was easier than to try and explain in chat where to go to on the map) and devs based the content around groups because it was something already existing. As soon as youtube/wiki/etc became widespread more and more players started to play solo.
So basically if you want people to play in groups and have "natural" social interaction you need to either go back in time to 2003/2004 or somehow remove wiki/youtube/discord/MMS/whatsapp etc and also make players forget their 20 years of playing MMOs.
