I use this UI all day, every day on a Ryzen 3900 with 12 cores, 24 threads, 32GB RAM, 300Mbps connection. It's always extremely slow, takes up obscene amounts of CPU and RAM. It's mind-boggling how they think, "this is ok".
The move to, "let's show them a pretty G spinner to compensate, because research shows that'll make them think it's fast" irks me to no end.