What is “Real TurbCAT”? Google doesn’t find it.
When FS 2020 was released they specifically said they didn’t want to add realism here because “players wouldn’t believe it’s realistic”. A stunning thing to say for a simulator but there it was. And people complain about light to moderate turbulence here so they are probably right.
Later on, it sounded like they were more interested in such realism but trying it now. I’ve had more turbulence flying around in clear weather in MSFS than when flying in a set of MSFS TCUs. It’s weird.
Active Sky makes it better but even at severe turbulence and all settings a maximum, it is not even “hard to control” let alone “uncontrollable”. If you stay below Va there is no drama. Even if you fly under Vno you’re unlikely to have issues. It is one area that X Plane can really shine in compared to MSFS.
The worst the sim seems capable of is no more than moderate bumps like flying on an average hot summer’s day. Very disappointing.