Why would that be a cause for replacement, especially if it still works great?
I have a mid-2010 Mac Pro that I do my video editing work on. I run OSX Mojave and Final Cut Pro X 10.4 on it because that's as far as I can go with it. However, it does everything I need it to do, so I have no plans to replace it, no matter what Apple decides.
My 2009 iMac is a hand me down from my son and I have really enjoyed using it for the last 7 years. The latest update is would accept was OS X Yosemite 10.10.5 . Unfortunately, eventhough it still functions great for many operations, it has become a nightmare to try to use to browse web content. The first notice I had of theses issues was several months ago while using this forum. I noticed that when someone posted a video on the OGR forum, the picture would appear and the start arrow but no time showed and it would not play. I mentioned that at the time on the support forum. Then I noticed that other sites I visited would often not show content or play a video. Then the Home Depot site would not allow me to open it. While trying to post listings on eBay, I would get to the last page and it would not let me finish so I had to use my iPad to do listings. But it really became an issue while shopping for Christmas gifts. One son and my grandchildren live 1600 miles away so I do most of their shopping on line because of free shipping. On five or six occasions, I would go through the whole check out process and at the end, I could not use my credit card. Simply going back through the whole process on my 2019 iPad allowed me to complete the purchase. Also, Netflix and Amazon Prime were complaining that I would not be able to get all content because my computer was not updated to a later opening system.
I really did not want to have to get a new computer, but the aggravation had become more that I wanted to tolerate.
johnrr6, thank you for the suggestion. I will check it out.
Don