I agree with some posts here: the OS is a real dog & Apple seem to be taking a longer time to have this be optimised for the MP, ie, in many or most earlier OS'es, a new release would be soon followed by tell-tale updates to pro apps support, FCPX, Logic etc. Not this time & 10.15.4 was a clear indication that Catalina is still broken.
On the hardware side, for Apple is OK enough, albeit overpriced as usual. Having said this, the Mobo & chipset will have a limited lifespan given the use of the 'Xeon light' CPU (& as it sits in other vendor's ranges below dual core Xeon bronze, platinum, gold etc). Ditto the AMD GPUs are a bit underwhelming for now but Apple's never going to do Nvidia & so we have to live with that, maybe in the hope of Big Navi a bit later.
Still, in my experience the hardware generally performs nicely on Pro Audio apps & is very quite in a studio. Just waiting for a decent OS really - my Windows 10 for Workstations is beating the crap out of this for now. Funny, is almost the direct opposite of 'mac vs windows' performance /usability a decade or so ago.