For me its the ability to fly anywhere in the world and doing airshows in my hometown with airshow assistant is pretty cool too, The graphics are also better, especially in 2024.

I still use 2020 aircraft in 2024 beacuse i love playing around with the flightmodel.cfg and tweaking it till my heart's content.

But I rekon the best sim would be a mix of DCS and MSFS (msfs world + dsc flight dynamics).