Had a look, seems like facebook–ish UI but 10 years ago. Correct?

No, that's not correct at all! 🤦🤦🤦

Friendica is the most beautiful and powerful social media software in the Fediverse: it can make you write long, formatted posts with in-line images, with title or without title, it can publish scheduled posts, it can make you follow websites with RSS feeds , Diaspora and GNU Social profiles, it has a connector for Bluesky and TumbIr, it can manage circles like Google+, it can manage public ActivityPub groups (basically like Lemmy communities) but also private ones, it manages activitypub events like those of Mobilizon and Gancio.

The development is continuous and always cutting edge and the developers are pretty smart!

Unfortunately it has two problems that compromise its success:

• the lack of an iOS app
• a painful web 1.1 interface reminiscent of the original Facebook, but unfortunately the development staff no longer has any professional graphics. In reality it would be enough to adapt the soapbox interface (not everyone knows that it is possible to manage a friendica account through the soapbox interface!), but this is a bit of a sore point...

If you want to undertake the development of new Fediverse software, I recommend you take a look at Friendica and, if possible, also Misskey, Bonfire and Kbin; however in the Fediverse it is also important to try to reinvent the wheel, because the diversity of ideas is the true richness of the Fediverse