I've been following a discussion on the Apple forums about Catalina's unreliable behavior concerning NAS devices. There are many people complaining. I just saw this post, which basically says:
Now, the user who posted in Dutch, and the Apple support ticket he points to is in Dutch, so there may be a bit of a language translation problem. But the fact remains: Catalina has broken NAS connections that have been stable since OSX Lion, and Apple seems far more intent on promoting DAS (direct attach storage) than anything else. And it seems to be the case for many other users all over the world, with absolutely nothing coming back from Apple.At first they appeared willing to help: a support engineer did a remote connect to my MacBook, we did a screen recording and a dump of the network traffic when recreating the connection problems with my NAS. It then remained quiet. After sending a reminder to Apple I got the anwser that 1) Apple does not support NAS and 2) I should contact the manufacturer of my NAS.
Would you be inconvenienced at all if Apple were to say "SMB and AFP? RIP!" Do you have enough sway with Apple to get them to address this issue in a more serious fashion?
I've already paused my plans to get a Mac Pro 2019 for other reasons, but it looks like its time to really migrate away from the whole platform.