EpicLoot mod is the end game. Just saying. When you have cleared the vanilla, built a base (or 50) on 10 different realms, you do 1 of 3 things;

1) burn out.
2) install some mods to add content and quality that extends the life of your game.
3) find an online server to join (Need a Discord account, links below)

Jotunheim is un-modded, like the original game but.. with more vikings! Also, their community has built a main quest line, which is awesome-sauce when you first join the realm!
discord.gg/WmRVCMMR5f

Tyrenheim (my personal fav') is lightly modded, with leveled zones. Mostly focused on adding to quality of life and helping each other from the day you spawn-in.
https://discord.gg/srEVGkDRWJ

Alfheim is ridiculously modded to the point you think your viking got trapped inside of the rainbow bridge. Players seem mostly dissociated, unless you ask for help.
discord.gg/zeEfXRT

Please be cautious when following external links, of course.

All three of those online realms have excellent communities, very helpful. They build huge engineering projects, they have active devs and admin support, and offer a diverse number of mods that you can sample. Each of those realms also offers community events and anti-cheat software.

So, stop thinking 'end' game BiS, because little brother, there is more!