Well... AMP goes more far than have a mobile ready website. Nowadays AMP is something needed and lots of important websites already adopted it.
@punit2502 If you care about SEO, simply choose another forum software. At this development stage, Flarum's SEO is totally messed up.
From my own experience, we migrated our community from MyBB to Flarum and we lose 60% of organic traffic in less that 48 hours. We had to restore MyBB and organic traffic needed two weeks to return to the "normal" numbers.
So... Flarum is good piece of software and concept but not SEO ready. In other words, if you are planning to get traffic from Google, forget it.