I’m definitely gonna add to this!! So I purchased my 2019 27 inch iMac (16 gigs ram) in middle of 2020. I use it strictly for recording and mixing music. So there’s hardly any other apps that I’ll open besides Logic Pro x, or maybe watching Netflix and streaming services every now and then. it was working OK when I was using Catalina, but then … I downloaded Big Sur 11. And everything went down the toilet, it started stalling for five minutes before it would even turn on. And even when it did I noticed a HUGE Change in performance when it came to opening and using Applications. Including my recording software. This is a brand new computer keep in mind, that I paid very good money for. So of course I’m gunna complain. I called customer service about eight times for the same reasons and they could never give me a clear answer on what to do (understandable) not everyone has all the answers. So I ended up eventually taking it into my local Apple store with an appointment to get it looked at. All they could tell me was they’re going to wipe out the entire computer and erase everything and start from scratch. That was a “Apple Genius” saying that. Which I said was fine, they did that and the problem still preceded. I know it has something to do with the updates. My fear is they created these updates on assumption that everybody is switching to the Apple one chip and moving away from Intel. I feel like they geared these updates to cater only to their Apple one chipped computers. I could be wrong but a part of me feels like I’m absolutely right!! This is ridiculous we all paid a hefty penny for these computers and they’re already throwing them out the window it seems like. But lets hope they do something about this!