Mine is a standalone license, not subscription. Seems like from other experiences with 2019, 30 seconds is not out of line.
Everything else is greatly improved, windows loading, first login, most other programs....
I can can watch TC start to load, then disk activity stops and network activity starts, pinging the net for quite a while. Then when network activity stops, TC finishes loading. I would say, if there wasn't the network delay, It would be loaded in about 20 seconds.
My system is a Taichi X399 with a Threadripper 1920X