1Dot Yeah But this is something different I was talking about Support and also about devs
I think you are misunderstanding Open Source software. While you can have a service level agreement with a company buying an enterprise product you cannot expect the same from an Open Source project that is dependent on the goodwill and many hours of its developers contributing. So expecting a reply on every support request in a matter of hours, maybe also on a weekend is really out of scope. To make the connection to Discourse - I am sure you will also there find topics not answered. While I also have to add that all help requests here get attended and a solution is provided for a very high number of people!
Also, I need to add that there are enterprise hosting options coming up for Flarum (Blomstra for example). There you can pay to get an agreed-upon service time. So If you are not able to help yourself and don't want to depend on Open Source support then this might be an option. Or maybe consider just buying other enterprise forum software if that's an requirement.
1Dot and also about why is it still with very less features
This has been discussed many times. Keeping the core small makes way to keep it actively updated while adding more possibilities to extend. Having more extensions operated by the core developers will take time from that. Having more people contribute to Flarum would help of course. But this is a process that's not really in the are of influence of the Flarum team. Flarum is an awesome piece of software - now in stable state. As the community grows, so will the number of contributors and therefor extensions and features.
1Dot Extensions from devs are great but in some extensions we can't see such a great quality
I think Flarum has a fascinating number of compatible extensions already. You will always find some that are not working as expected but generally speaking there are many dedicated extensions developers around. Making such a general statement is an affront to their contributions - which are mostly also Open Source and thus completely free of charge.