I do appreciate your frustration with your system not behaving the way you expect.
Is there actual evidence that Apple is conspiring to make people buy new computers by making their older ones stop working? I realize that you believe that to be the case, but I am asking because the company I work at has just mandated EVERYONE on Macs upgrading to Catalina, it's required due to IT Security requirements imposed by our primary customer. This means that between September 2020 and January 2021, about 4,000 Macs here were upgraded to Catalina. Including my work computer. Not only that, it was pushed out through our IT department, if you didn't upgrade by a certain date, it was forced remotely. More than 90% of us are still working remotely from home due to the pandemic, so that made it even more complicated, no in-person IT support. We are also all on mandatory full disk encryption, which adds another way that something can go wrong.
How many of these Catalina Macs are "older"? Not sure, but we normally are "replenished" with new units every three years. However, that has been slowed down due to the remote work/pandemic, so many, including me, have older than 3 years old Macs. (Mine is 4 years old.) Some have Macs that are 5-6 years old or older, they like to cling to them as long as possible.
We have a discussion board where people post issues or problems and either the IT support people respond, or contact you directly to remote in if need be and fix it, or often other users post their solutions, much as is done in these Apple discussions. The majority of users here have external disks used for backup, some bootable. I have one bootable clone, and two Time Machine backups, all still working well. We are also provided with a commercial cloud backup service. Most in house discussion posts have to do with things like webex video remote meetings setup and software settings, stuff like that, and also password resets/updates which we are also mandated to do every 3 months. It's mostly mundane stuff. But I haven't seen anything in our discussions about bootable clones not working, and I know people wanted reliable clone backups when the Catalina update was mandated, just in case. But the transition went smoothly.
I was concerned when reading this thread, especially with my own Catalina upgrade coming up, but it went smoothly. is there actual evidence that Apple is conspiring in the way you suggest, or is this something you have deduced, read on the internet, etc. If Apple is actually doing this, why haven't we seen more failures at my company?