As much as it can be used on phone it is best with a computer system... I even noticed that without a computer system some challenges or updates one will not be able to follow up...
Of course using this forum on the desktop is way easier than using it on a smartphone browser. Many members also tried to implement this forum in an app as well but not many members gave preference to that app for the sake of privacy which they don't care much hehe no offense. And can you please shed some more light on what kind of tasks or challenges are easy to follow up on desktop? As you are not able to wear your signature AFAIK.
If you don't then why or how did you come to face this challenge? I mention this challenge specifically because we really find it hard to wear signature as it is hard to copy on the smartphone, so I have to use desktop to copy the code. Besies this challenge, I don't think there is any other tasks that require desktop.