There are many good plugins which are not free but Q2A needs them.I think Q2A must include some of them like plugins https://pupi1985.github.io/ has here.Also esperedo has plugins here ; https://www.e-dostluk.com/q2a-demo/
I think these must have in Q2A sytsem but system does not have it.Beside these good plugins people can ask special request from these guys.
If I my website grows up well in that case I will have to buy them for now I cant.I respect these guys and for their works but Q2A developers have to do something for these plugins.
As a result, like other cms , Q2A has to have them.
Another issue is plugins page.It is tortures me when I go that page for changing.Changing , updating , finding a plugin are difficult.
Also we could have to upload ,remove plugins or theme without going to ftp.