[Roger Darthwell]

I still believe that the BBC has made the right choice in bringing BBC Three back, research also provled that the online move was a flop, it was proven that moving channels online only does NOT work, if the schedule is not strong then this is another matter

The BBC Three move to online and the consequences of that decision does not definitively prove that moving linear channels online will always fail.  There are a multitude of parameters at play.

Well, if I have to be honest, and I am going to quote both Allanbuzzy and interestednovice here if the concept of FAST channels as we know them had come into the mainstream back in 2016 then BBC Three could have worked as a FAST channel, if you remember Clean Feed, all the promos back then were around how BBC Three was moving online when in reality all it’s programmes were simply dumped on the iPlayer and there was a token attempt to promote them through a few pages on social media, and that was it, it was hardly an “online service” at all.
Also we have to bear in mind that with BBC Three's closure the BBC was left with loads of empty bandwidth, and they didn't save anything on that aspect. As you said there are indeed a multitude of parameters at play