That is for a different scenario. It means that if you already have a residence permit, you have to wait 8 years before you can apply for citizenship. OP is talking about marriage green card. For 75% of cases in Sweden it is less than 15 months to get a residence permit.
[1] https://www.migrationsverket.se/en/you-want-to-apply/live-wi...
And for US green cards for marriage you can get them in 10 to 24 months (Before this change).
https://www.boundless.com/immigration-resources/how-long-doe...
Funnily, I had a German friend complain about this change and then I came across this Reddit thread.
https://old.reddit.com/r/immigration/comments/1tks87l/trump_...