about 5 years ago - Avanya - Direct link
You don't have to start all over every time. You will likely need to check your mods a bunch of times to remove broken ones and you might need to remove some workshop assets to make room for the new content, but starting fresh isn't a requirement. Some people choose to do so, but it's just an option.

I hate the idea of having to find all the goodies I'm subscribed to, so I haven't unsubscribed everything ever. I've removed lots of mods and assets over the years, but I really don't like starting all over again. :P

If you want to give it a go at not starting fresh this time, I suggest checking out this thread and following it in the weeks after release. I will be updating it with information to help others figure out what mods break and need to be removed, so they can get back to playing. And if there's something it doesn't answer, just ask. I'm here to help others with modded games through the update. :)

https://steamcommunity.com/app/255710/discussions/0/1870623125774285868/